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E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.

It states that plastic which are already present in the ocean are not decomposed yet,so the observation is not due to the current year but due to past year plastics before the ban of SUplastics
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­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased. Evidence of this is the consistent volume of plastic waste found during beach cleanups over the past year compared to the previous year. Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade.
Explanation: This indicates progress in reducing plastic production but does not explain why plastic debris levels on beaches have not decreased. INCORRECT

B. The amount of plastic waste produced annually varies significantly from year to year.
Explanation: Variability in annual plastic waste production could contribute to inconsistent debris levels, but it doesn't provide a strong reason for the recent observation and the reaction of scientists. INCORRECT

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.
Explanation: While this option supports the effectiveness of bans, it does not explain why debris levels on beaches have not decreased. Also, we cannot deduce a link between these regulations to the phenomenon observed on the beaches to which scientists expressed their opinions. INCORRECT

D. Strong ocean currents this year have carried more debris to coastal areas than usual.
Explanation: This addresses the observed consistent volume of plastic debris on beaches. It suggests that the debris levels could be influenced by external factors like ocean currents, which might bring more plastic to beaches. But it doesn't provide evidence that the ban was effective. What if it wasn't and more plastic was thrown into the ocean which was then washed ashore? INCORRECT

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.
Explanation: This option is the most compelling because it explains why the volume of plastic waste found on beaches may not have decreased, even if efforts to reduce single-use plastics have been effective. CORRECT

The correct answer is Option E­
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Environmental scientists have not concluded that these bans are ineffective. They haven't said that these bans are effective either. What was it that made scientists doubt in the first place? It was past year's consistent volume of plastic waste washing up at the beaches, compared to the year before. So why don't scientists conclude that the ban is ineffective?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade.

This somewhat supports the effectiveness of the ban, but it doesn't explain why the scientists would go, "Hmm.. consistent plastic waste washing up doesn't prove anything".

B. The amount of plastic waste produced annually varies significantly from year to year.

We are talking about global efforts and not one country's efforts. So we cannot say that the waste must have come from some nearby country. Also, this option vaguely says that the production varies year to year, increases or decreases, we don't know.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.

Doesn't explain why consistent waste is washing up on the beaches.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.

This looks promising as we can say that since the ocean currents have carried more debris than usual, and the amount of plastic that is in debris is almost the same as last year's, the overall plastic might have reduced. This addresses a temporary increase in total debris, explaining why plastic waste hasn't decreased in volume. Scientists might not conclude the bans are ineffective because the additional debris complicates immediate assessment. Or in short, more debris this year = more plastic than normal. Thus we cannot call the ban ineffective. Thus this is our answer

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.

This addresses the long-term persistence of plastic, providing a reason why plastic waste continues to be found despite the bans. But it doesn't explain why it has been consistent in the past year compared to the previous year.

So basically, as per the results of the study, the plastic debris washing up has not decreased. To support this, we have an evidence. But (D) proves that this evidence cannot be used to explain the findings.­
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Bunuel
­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased. Evidence of this is the consistent volume of plastic waste found during beach cleanups over the past year compared to the previous year. Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade.

B. The amount of plastic waste produced annually varies significantly from year to year.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.


­
 


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­
­The gap is why is the volume of debris this year consistent compared to the last year.
Option D answers it properly addressing that even though the total amount of plastic may have reduced, the oceam current carried more debris to the coast than usual. Hence the ban is not ineffective.
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A- Production is not related to banning.
B- Production can increase or decrease we don't know.
C- But are these regulations effective or not?
D- Explain why plastic debris is increasing.
E- The ban will have long term effect, which are not seen immediately.

Imo E.
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A. The production of single-use plastics has been significantly reduced in most countries over the past decade. #address a different point

B. The amount of plastic waste produced annually varies significantly from year to year. #if it has reduced, then scientist should have reacted oppositely

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.#Irrelevant

D. Strong ocean currents this year have carried more debris to coastal areas than usual.#Correct. Actually amount has reduced, but more debris so more accumulated waste came up

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. #Previously also this remained same

Answer D­
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Ans : E

Goal : We have to find option that challenges studies metric of comparing pastic ban with amount of plastic found on beaches.

Strengthen scientist reasoning :

1) This will not help as evidince of plastic on beaches is not negated
2) Irrelevant
3) But still amount of plastic had increased
4) This year comparision is not mentioned in stimulus, out of scope
5) This strengthens at this waste might be old.
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Banning Single Use Plastics (SuP) not decreased the amount of plastic debris washing up on beaches has not decreased. Evidence- Volume of Plastic waste debris on sea shores not decreasing Year on Year.
Environmental scientists(ES) have not concluded that these bans are ineffective. We have to find a reason why ES feels bans are effective.

­A. The production of single-use plastics has been significantly reduced in most countries over the past decade.
If the production of SuP is reducing, than there should be less plastic waste yoy. But this is against the evidence given in the passage.

B. The amount of plastic waste produced annually varies significantly from year to year.
We don't know how is the variation if the production is less than there should be less plastic waste debris. If there is high production, this explains why there is no change in volume of plastic debris. Both these does not support the ES conclusion.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.
But why they have implemented these and what are the after effects of these SUP bans. We don't know this information.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.
This explains why there is an alternate reason for increase in debris. If there are no strong ocean currents, than the plastic waste debris at the beach will have to be lesser which shows that the bans are effective.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.
Yes, but if SUP bans are in place, than we should see the reduction of plastice waste in the plastic debris washing up the shore. This information does not helps in ES conclusion.

IMO D.
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Bunuel
­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased. Evidence of this is the consistent volume of plastic waste found during beach cleanups over the past year compared to the previous year. Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade.

B. The amount of plastic waste produced annually varies significantly from year to year.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.


­
 


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­This is similar to inference, But we need to provide reasoning for the anomaly.

A. The production of single-use plastics has been significantly reduced in most countries over the past decade. So what, irrelevant.

B. The amount of plastic waste produced annually varies significantly from year to year. So what, irrelevant.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.So what, irrelevant.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.So what, irrelevant.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. Hmm, If this is true. Although the ban has fruitful results it will take 100 years to show it's effects.

Hence IMO E.
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Background: ­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased.
Premise: Consistent volume of plastic waste was found during beach cleanups over the past year compared to the previous year.
Conclusion: Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade. This weakens the scientists' stance because the plastic waste on the beach has not reduced despite the ban

B. The amount of plastic waste produced annually varies significantly from year to year. Doesn't explain why the scientists still support the ban.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years. This weakens the scientists' position because even strict regulations have not made the ban effective.

D. Strong ocean currents this year have carried more debris to coastal areas than usual. The scientists' conclusion is based on amount plastic waste on the beach in past year and the year before that.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. Correct. Implies that plastic waste could be from before the ban was put in place.
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Bunuel
­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased. Evidence of this is the consistent volume of plastic waste found during beach cleanups over the past year compared to the previous year. Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade.

B. The amount of plastic waste produced annually varies significantly from year to year.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.


­
 


This question was provided by GMAT Club
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­
­(A) The production of single-use plastics has been significantly reduced in most countries over the past decade.
  • This suggests a reduction in production but doesn't explain the current volume of debris on beaches.

(B) The amount of plastic waste produced annually varies significantly from year to year.
  • Variability doesn't provide a clear reason why the debris levels remain the same or why scientists haven't concluded the bans are ineffective.

(C) Many countries have implemented strict regulations against the use of single-use plastics in the past few years.
  • This highlights the regulatory efforts but doesn't explain the scientists' reasoning regarding the unchanged debris levels.

(D) Strong ocean currents this year have carried more debris to coastal areas than usual.
  • This provides a plausible reason for why debris levels have not decreased despite bans, suggesting that the consistent volume of debris might be due to unusual ocean currents rather than the ineffectiveness of the bans. However, it states this year not the past year

(E) CORRECT. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.
  • This indicates the long-term persistence of plastic waste. It explains why old waste might still be present, affecting the debris levels, and why scientists haven't seen immediate effects from the bans.
­
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­Choice D

Evidence: Plastic debri washing up has not decreased, even after banning single use plastic
Evidence: Last year debri is compared to previous year's and the result is consistent with the above evidence
Conclusion: Scientists are optimistic that the bans are not ineffective

Question: Strengthen scientists reaction.

So, evidence suggests that banning single use plastic did not work. But on the other hand Scientists haven't concluded that these bans are ineffective.
Couple of scenarios:
1. Maybe instead of single use plastic, people found an alternate plastic?
2. Unusual amounts of plastic debris could have washed up shores maybe due to cyclone, increased sea activities etc...
3. Maybe that positive result would take atleast more than a year


A. The production of single-use plastics has been significantly reduced in most countries over the past decade. Production has reduced, but it doesn't explain why the waste washed up did not reduce. Additionally, this doesn't help scientists to stay optimistic about the ban Incorrect

B. The amount of plastic waste produced annually varies significantly from year to year. Okay, so year to year plastic produced varies. Since, the last year the amount of plastic waste washed up shores did not decrease, we can safely conclude that the ban did not work. WHy? because according to this choice the waste produced was almost same to year before Incorrect

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years. This isn't helping either. Many countries banned single use plastic, but the ban maynot be effective because of the amount of plastic waste washed ashore Incorrect

D. Strong ocean currents this year have carried more debris to coastal areas than usual. Correct So, last year was an unusal case indeed. Compared to the year before the ocean currents are strong and hence a lot of debris washed up. If the ocean currents were almost similar to the year before, then maybe the overall plastic waste that would have washed ashore would be less, proving the ban may have worked. Hence, Scientists optmistic reaction

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. Again similar to Choice B and C, this choice doesn't tell us why there was no decrease in the plastic waste washed ashore Incorrect
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Bunuel
­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased. Evidence of this is the consistent volume of plastic waste found during beach cleanups over the past year compared to the previous year. Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade.

B. The amount of plastic waste produced annually varies significantly from year to year.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.

D. Strong ocean currents this year have carried more debris to coastal areas than usual.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.


­
 


This question was provided by GMAT Club
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­To understand why environmental scientists have not concluded that the bans on single-use plastics are ineffective despite the constant volume of plastic waste found on beaches, let's analyze the options:

**A. The production of single-use plastics has been significantly reduced in most countries over the past decade.**

- This option indicates that efforts to reduce plastic production have been successful. However, it does not explain why the amount of plastic debris on beaches remains the same. It doesn’t directly address why the bans might still be seen as potentially effective.

**B. The amount of plastic waste produced annually varies significantly from year to year.**

- While this option shows variability in plastic waste production, it does not directly explain why the bans on single-use plastics might still be considered effective despite unchanged beach cleanup volumes.

**C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years.**

- This option indicates that there have been more regulations recently, but like option A, it doesn't explain why the beach plastic waste has not decreased. It doesn't directly relate to the persistence of plastic waste already in the environment.

**D. Strong ocean currents this year have carried more debris to coastal areas than usual.**

- This option provides a plausible explanation for why there might be no reduction in plastic waste on beaches despite bans on single-use plastics. If strong ocean currents brought more debris to the coast, it could explain the consistent volume of waste without implying the bans are ineffective. This suggests that external factors, not the effectiveness of the bans, are responsible for the observed data.

**E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.**

- This option explains that plastic waste already present in the ocean can last a very long time. Thus, even if the production and use of new single-use plastics have decreased, the existing plastic waste would still wash up on beaches for years to come. This explains why the bans might not have led to an immediate decrease in beach plastic waste but could still be effective in the long term.

**Best answer (E):**

This option provides the strongest reason for why scientists have not concluded that the bans are ineffective. The persistence of plastic waste in the ocean for hundreds of years means that current beach waste levels are more influenced by past plastic pollution than recent bans. Thus, the long-lasting nature of existing plastic waste explains why immediate decreases in beach waste are not observed, even though the bans might eventually lead to less plastic entering the environment.
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Hi bb, Bunuel

I don't agree with D as the correct answer because the periods in question with consistent waste were past and previous years. The scientists' based their conclusion on those patterns. The strong ocean current this year does not explain why consistent waste was being brought in the last two years. If it had been a general statement like ' strong currents sometimes bring in...." then that would have served as a correct answer. However, in this case the phenomenon is restricted to one period i.e. this year.
E offers a better reasoning by stating that ocean holds the waste for a very long time implying that that waste being brought in by the waves can explain why the plastic waste on beaches have not reduced yet.

Request you to share your opinion.

Thanks
CKHE
Background: ­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased.
Premise: Consistent volume of plastic waste was found during beach cleanups over the past year compared to the previous year.
Conclusion: Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade. This weakens the scientists' stance because the plastic waste on the beach has not reduced despite the ban

B. The amount of plastic waste produced annually varies significantly from year to year. Doesn't explain why the scientists still support the ban.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years. This weakens the scientists' position because even strict regulations have not made the ban effective.

D. Strong ocean currents this year have carried more debris to coastal areas than usual. The scientists' conclusion is based on amount plastic waste on the beach in past year and the year before that.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. Correct. Implies that plastic waste could be from before the ban was put in place.
­
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bb no kudos is awarded on the post. Correct answer with elimination of other options is provided.
jack5397
IMO - D

Question type - find the paradox

A. The production of single-use plastics has been significantly reduced in most countries over the past decade. //Eliminate- Actually this option creates more doubt about the effectiveness of the ban if ban was implemented well then plastic on the shore should have reduced.

B. The amount of plastic waste produced annually varies significantly from year to year. // Eliminate - As this against gives no reason why scientists believe ban is effective.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years. //Eliminate- Actually this option creates more doubt about the effectiveness of the ban if ban was implemented well then plastic on the shore should have reduced.


D. Strong ocean currents this year have carried more debris to coastal areas than usual.// Correct perfectly fits the situation.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing.// Eliminate - Irrelevant because does not provide the reason if ban is effective or not.

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CKHE
Hi bb, Bunuel

I don't agree with D as the correct answer because the periods in question with consistent waste were past and previous years. The scientists' based their conclusion on those patterns. The strong ocean current this year does not explain why consistent waste was being brought in the last two years. If it had been a general statement like ' strong currents sometimes bring in...." then that would have served as a correct answer. However, in this case the phenomenon is restricted to one period i.e. this year.
E offers a better reasoning by stating that ocean holds the waste for a very long time implying that that waste being brought in by the waves can explain why the plastic waste on beaches have not reduced yet.

Request you to share your opinion.

Thanks
CKHE
Background: ­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased.
Premise: Consistent volume of plastic waste was found during beach cleanups over the past year compared to the previous year.
Conclusion: Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade. This weakens the scientists' stance because the plastic waste on the beach has not reduced despite the ban

B. The amount of plastic waste produced annually varies significantly from year to year. Doesn't explain why the scientists still support the ban.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years. This weakens the scientists' position because even strict regulations have not made the ban effective.

D. Strong ocean currents this year have carried more debris to coastal areas than usual. The scientists' conclusion is based on amount plastic waste on the beach in past year and the year before that.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. Correct. Implies that plastic waste could be from before the ban was put in place.
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Agree with this bb please reconsider these options again.
D. Strong ocean currents this year have carried more debris to coastal areas than usual. - This is actually could have been good option if there was another word instead of "This year" Because it limits the scope of argument, as argument specifically talks "...Based on the evendence of the consistent volume of plastic waste found during beach cleanups over the past year compared to the previous year..." Which makes it less good IMO. If strong currents were only a factor this year, it wouldn't account for consistent debris levels across multiple years. So Eliminated.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. - Correct - It suggests that the impact of the bans may not be immediately observable due to the long-lasting nature of plastic waste already in the ocean. Perfect. This is our answer.­
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CKHE
Hi bb, Bunuel

I don't agree with D as the correct answer because the periods in question with consistent waste were past and previous years. The scientists' based their conclusion on those patterns. The strong ocean current this year does not explain why consistent waste was being brought in the last two years. If it had been a general statement like ' strong currents sometimes bring in...." then that would have served as a correct answer. However, in this case the phenomenon is restricted to one period i.e. this year.
E offers a better reasoning by stating that ocean holds the waste for a very long time implying that that waste being brought in by the waves can explain why the plastic waste on beaches have not reduced yet.

Request you to share your opinion.

Thanks
CKHE
Background: ­Recent studies show that despite global efforts to reduce plastic waste by banning single-use plastics, the amount of plastic debris washing up on beaches has not decreased.
Premise: Consistent volume of plastic waste was found during beach cleanups over the past year compared to the previous year.
Conclusion: Nevertheless, environmental scientists have not concluded that these bans are ineffective.

Which of the following would, if true, provide the strongest reason for the scientists' reaction to the findings?

A. The production of single-use plastics has been significantly reduced in most countries over the past decade. This weakens the scientists' stance because the plastic waste on the beach has not reduced despite the ban

B. The amount of plastic waste produced annually varies significantly from year to year. Doesn't explain why the scientists still support the ban.

C. Many countries have implemented strict regulations against the use of single-use plastics in the past few years. This weakens the scientists' position because even strict regulations have not made the ban effective.

D. Strong ocean currents this year have carried more debris to coastal areas than usual. The scientists' conclusion is based on amount plastic waste on the beach in past year and the year before that.

E. Plastic waste can persist in the ocean environment for hundreds of years before decomposing. Correct. Implies that plastic waste could be from before the ban was put in place.
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Hi. Thank you so much for the question.
As you mentioned, there is this odd thing about more debris brought in while plastic staying constant in D.

The reasoning is that since this year, strong currents have carried more debris to coastal areas and we found the same amount of plastic waste (which contributes to a portion of the the debris). Logically we should have found more plastic since there was more debris. Since we did not find more and levels remained constant, this means the bans are indeed working because the contributing factor was the currents throwing measurements off.

E is talking about decomposing of plastics - yes, it is an unfortunate reality and some of it can stay in the ocean for a long time. This answer choice does not say that plastics take hundreds of years to wash ashore or that there is a delay in banning and seeing results. It just says that decomposing is not going to reduce plastic waste for at least a few hundred years. No one expects plastic to decompose and reduce the volume of plastic washing up on the beaches. Scientists are measuring the ban effectiveness with the plastic debris washing up, and they are seeing no change. It clearly did not decompose but it should have reduced at least somewhat. Also, our argument is about scientists believing that bans are working, so the correct answer choice would give a reader a clear explanation why the bans were effective, while resolving the paradox that the amount of plastic waste has not changed. This answer choice provides a plausible explanation why the waste may be washing up for hundreds of years after the ban, but why is it constant and why did the scientists feel the ban is working - that is the missing piece that makes this answer choice incorrect.­

Hope this helps. Welcome feedback.­
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