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Journalist: A recent study showed that people who drink three cups

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Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 17 Sep 2017, 10:36
5
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A
B
C
D
E

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  65% (hard)

Question Stats:

57% (01:31) correct 43% (01:27) wrong based on 223 sessions

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Journalist: A recent study showed that people who drink three cups of decaffeinated coffee per day are twice as likely to develop arthritis - inflammation of joints resulting from damage to connective tissue - as those who drink three cups of regular coffee per day. Clearly, decaffeinated coffee must contain something that damages connective tissue and that is not present in regular coffee.

Which one of the following would be most useful to know in order to evaluate the journalist's argument?

(A) whether people who exercise regularly are more likely to drink decaffeinated beverages than those who do not
(B) whether people who drink decaffeinated coffee tend to drink coffee less often than those who drink regular coffee
(C) whether the degeneration of connective tissue is slowed by consumption of caffeine and other stimulants
(D) whether most coffee drinkers drink more than three cups of coffee per day
(E) whether people who have arthritis are less likely than the general population to drink coffee of any kind

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Re: Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 17 Sep 2017, 17:12
I chose A- to evaluate if there is another cause (exercise stress on the joints) for damages to connective tissues.

In choice C- the evaluation is on ingredients of caffeine coffee. However, the conclusion of the argument is on the ingredients of decaffeinated coffee.

Any color on this would be helpful.

Thanks,
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Re: Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 17 Sep 2017, 19:06
Can anyone explain the choices with reasoning? My choice was A.
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Re: Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 17 Sep 2017, 19:23
Hi, I am not able to get how the answer is C. My pick was A but the OA is C, also I am not able to get the meaning of C.
"whether the degeneration of connective tissue is slowed by consumption of caffeine and other stimulants". Does this mean the generation of connective tissue was fastened by caffeine?
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Re: Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 17 Sep 2017, 19:53
Masshole wrote:
Journalist: A recent study showed that people who drink three cups of decaffeinated coffee per day are twice as likely to develop arthritis - inflammation of joints resulting from damage to connective tissue - as those who drink three cups of regular coffee per day. Clearly, decaffeinated coffee must contain something that damages connective tissue and that is not present in regular coffee.

Which one of the following would be most useful to know in order to evaluate the journalist's argument?


(A) whether people who exercise regularly are more likely to drink decaffeinated beverages than those who do not
If YES, then it is supposed that those people are less likely to develop arthritis. This conclusion contradicts the argument.
If NO, then we can't conclude anything. This choice seems to be a trap.


(B) whether people who drink decaffeinated coffee tend to drink coffee less often than those who drink regular coffee
This choice can't help to evaluate the argument that whether decaffeinated coffee contains anything that damages connective tissue and that is not present in regular coffee

(C) whether the degeneration of connective tissue is slowed by consumption of caffeine and other stimulants
Correct. By asking whether there are something in decaffeinated coffee but not in regular coffee, we could miss a possible case: those things are in both decaffeinated coffee and regular coffee, but there is some other substance in regular coffee that could help to slow the degeneration of connective tissue.

(D) whether most coffee drinkers drink more than three cups of coffee per day
The drinking frequency is irrelevant

(E) whether people who have arthritis are less likely than the general population to drink coffee of any kind
Compared to general population is out of scope.
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Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 23 Sep 2017, 10:36
jamescath wrote:
Hi, I am not able to get how the answer is C. My pick was A but the OA is C, also I am not able to get the meaning of C.
"whether the degeneration of connective tissue is slowed by consumption of caffeine and other stimulants". Does this mean the generation of connective tissue was fastened by caffeine?

This does not mean that the generation of connective tissue was hastened by caffeine. Rather, this means that the deterioration of that issue was slowed.

Thanks broall for the explanation!
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Re: Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 24 Sep 2017, 21:37
Quote:
Premise: People who drink three cups of decaf are more likely to get arthritis than those who drink three cups of regular.

Conclusion: Decaf coffee contains something that damages connective tissue and isn't present in regular coffee.

The problem is that the argument goes to "damage" of tissue, as opposed to "protection" of tissue. (You could also argue causation vs. correlation, but the answers choose not to explore that issue.)

(A) The problem is that it says "beverages," rather than "coffee." Imagine we had an answer to that issue: "Yes, people who exercise regularly are more likely to drink decaf beverages." We'd still have to find out if that connects to coffee. It could be tea or soda.

(B) We already know this is about people who drink three cups.

(C) CORRECT. Aha! Could be that regular coffee protects, as opposed to decaf doing damage.

(D) Again, we already know it's about people who drink three cups.

(E) Again, this may or may not be true, but it wouldn't change what we know about people who do drink coffee.

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Re: Journalist: A recent study showed that people who drink three cups  [#permalink]

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New post 28 Apr 2018, 23:32
+1 for option C. We are required to choose an option for which conclusion will be valid for one extreme and invalid for another. Only option C fits the bill. A is wrong because you can't assume exercise effects chances of arthritis. E is wrong because it talks about general population for any type of coffee - it has no bearing on our conclusion.

Option C it is !!!
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Re: Journalist: A recent study showed that people who drink three cups &nbs [#permalink] 28 Apr 2018, 23:32
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