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Updated on: 01 Jun 2017, 11:59
Originally posted by bkpolymers1617 on 01 Jun 2017, 11:13.
Last edited by bkpolymers1617 on 01 Jun 2017, 11:59, edited 1 time in total.
Last edited by bkpolymers1617 on 01 Jun 2017, 11:59, edited 1 time in total.
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In 1883, the Indonesian island Krakatoa, home to a massive volcano, seemingly disappeared overnight as an eruption rent the entire island apart, catapulting rock and debris into the atmosphere. For the next years, as ash circled the entire globe, the average world temperature dropped by several degrees Fahrenheit. Therefore, an eruption of similar power in terms of the amount of debris ejected into the atmosphere will likely cause the average temperature around the world to drop by several degrees.
Which of the following, if true, best challenges the main claim of the argument?
A. In 1990, a major volcano took place in Japan but the average temperature increased as a result.
B. The eruption of the Indonesian island of Tambora was even larger than that of Krakatoa, yet the average world temperature did not drop as much as it did following the eruption of Krakatoa.
C. In 1883, the ocean-atmospheric phenomenon La Niña occurred, an event that is always followed by a drop of several degrees in the world’s average temperature
D. According to sophisticated computer analysis, the eruption of Mt. Toba between 69,000 and 77,000 years ago, one of the most powerful ever, may have hastened an ice age.
E. No volcanic eruption in the 20th century was close to the magnitude of the Krakatoa eruption, yet average world temperatures dropped between 1950 and 1960.
Official answer to follow.
Which of the following, if true, best challenges the main claim of the argument?
A. In 1990, a major volcano took place in Japan but the average temperature increased as a result.
B. The eruption of the Indonesian island of Tambora was even larger than that of Krakatoa, yet the average world temperature did not drop as much as it did following the eruption of Krakatoa.
C. In 1883, the ocean-atmospheric phenomenon La Niña occurred, an event that is always followed by a drop of several degrees in the world’s average temperature
D. According to sophisticated computer analysis, the eruption of Mt. Toba between 69,000 and 77,000 years ago, one of the most powerful ever, may have hastened an ice age.
E. No volcanic eruption in the 20th century was close to the magnitude of the Krakatoa eruption, yet average world temperatures dropped between 1950 and 1960.
Official answer to follow.
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01 Jun 2017, 11:47
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IMO it will be C
A is not close to relevant
B eruption might be larger but the author says an eruption of similar power.....the temperature dropped by several degrees...hence not relevant as this Indonesian island might be low in terms of amount of debris
C alternate cause of drop in temperature in the same year and impact following...appropriate
D debris nowhere
E who cares if Temperature dropped in the 20th century between 1950-1960 ...not challenging the claim that the amount of debris erupted by the K volcano is the cause of the drop in average temperature of the world
Please correct me if i am wrong
Sent from my iPhone using GMAT Club Forum
A is not close to relevant
B eruption might be larger but the author says an eruption of similar power.....the temperature dropped by several degrees...hence not relevant as this Indonesian island might be low in terms of amount of debris
C alternate cause of drop in temperature in the same year and impact following...appropriate
D debris nowhere
E who cares if Temperature dropped in the 20th century between 1950-1960 ...not challenging the claim that the amount of debris erupted by the K volcano is the cause of the drop in average temperature of the world
Please correct me if i am wrong
Sent from my iPhone using GMAT Club Forum
01 Jun 2017, 11:56
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Hey mynamegoeson
Yes you are right. Answer is c. i was confused between a and c. Can you tell please, why this is irrelvant to the argument. The argument makes a very generic claim so ca nt we talk about other volcanoes as well?
Yes you are right. Answer is c. i was confused between a and c. Can you tell please, why this is irrelvant to the argument. The argument makes a very generic claim so ca nt we talk about other volcanoes as well?
