vk_vinayak wrote:Nearly two tons of nuclear-reactor fuel have already been put into orbit around the Earth, and the chances of a collision involving such material increase greatly as the amount of both space debris and satellites continue to rise.
A. as the amount of both space debris and satellites continue to rise
B. as the rise continues in both the amount of satellites and space debris
C. as the amount of space debris and the number of satellites continue to rise
D. with the continually increasing amount of space debris and the number of satellites
E. with the amount of space debris continuing to increase along with the number of satellites
Provide explanations for each choice.
[spoiler]OA: C[/spoiler]
The intended meaning of the sentence here is to give a reason for the prediction of why " the chances of a collision involving such material increase greatly". This reason is given by words such as "as", "because", and "since" on the GMAT. "With" is a preposition and cannot be used to give reasons. Additionally, using "with" results, in most cases, in wordy, awkward, and unclear constructions. This is mainly because "with" - or any preposition - must be followed by a noun or an "-ing" noun phrase, and using a noun phrase always results in a clumsy construction. Additionally, the usage of "with" in this question makes it look like that given events are mutually exclusive and occurring together, and fails to establish a cause-effect relationship intended in the original sentence. Eliminate D and E
Answers A and B are incorrect. "Satellites" are countable.
"Amount of" should only be used for uncountable nouns - for example, "amount of water", "amount of money", "amount of mud", etc. Therefore, "the amount of satellites", is incorrect. Additionally, "
the amount of" is the main subject in Option A, and therefore the plural verb "
continue" is incorrect. "The rise" as a
noun is awkward in Option B.
This leaves us with option C, which uses "
number of" for countable (satellites) and "
amount of" for uncountable (space debris) correctly, and establishes the correct causal relationship between the two events:
Cause:
the amount of space debris
and the number of satellites
continue to rise
Result: the chances of a collision involving such material increase greatly.
Also, in option C, "rise" is being used as a
verb, resulting in a more active and direct construction, and the plural verb "continue" is correct since the subject "the amount..
and the number..." is plural.
Hope this helps.