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With the private space industry at the early stages of launch

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Senior Manager
Joined: 23 Nov 2016
Posts: 312
GMAT 1: 690 Q50 V33
With the private space industry at the early stages of launch  [#permalink]

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30 Mar 2019, 08:37
6
00:00

Difficulty:

95% (hard)

Question Stats:

25% (01:54) correct 75% (02:11) wrong based on 110 sessions

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With the private space industry at the early stages of launch revolution-it is expected that the number of launches is going to increase dramatically-it has become imperative to study the effects of the plume of exhaust that rocket leaves in its wake on the stratosphere and the Ozone layer.

A. it has become imperative to study the effects of the plume of exhaust that rocket leaves in its wake on the stratosphere and the Ozone layer.
B. Studying the effects on the stratosphere and Ozone layer caused by the plumes of exhaust left by rockets in their wake has become imperative.
C. The plume of exhaust left by a rocket in its wake has to be studied for its effect on the stratosphere and Ozone layer.
D. The study of the plumes of exhaust that rocket leaves in their wake and of the effect on the stratosphere and the Ozone layer has become imperative.
E. it has become imperative to study how the plumes of exhaust that rocket leaves in its wake affects the stratosphere and ozone layer .

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Manager
Joined: 20 Feb 2017
Posts: 88
Location: United States
Re: With the private space industry at the early stages of launch  [#permalink]

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30 Mar 2019, 14:00
1
why not E?

Option E changes the meaning of the stem sentence.

(E) it has become imperative to study how the plumes of exhaust that rocket leaves in its wake affects the stratosphere and ozone layer .

Studying how - is study of the mechanism, which is not what stem sentence concerns with.
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CEO
Joined: 15 Jul 2015
Posts: 3049
Location: India
GMAT 1: 780 Q50 V51
GRE 1: Q170 V169
Re: With the private space industry at the early stages of launch  [#permalink]

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30 Mar 2019, 18:40
why not E?
One way to remove E is to check whether the verb affects is supposed to be singular or not. We'll ignore the fact that we can't say "rocket leaves" (unless the that refers to a particular rocket, but no such rocket is mentioned in this sentence).

... to study how the plumes of exhaust that rocket leaves in its wake affects the stratosphere and ozone layer.

In this option, the subject of affects (singular) is actually plumes (plural), and that's not right.
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Joined: 29 Jun 2017
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Re: With the private space industry at the early stages of launch  [#permalink]

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30 Mar 2019, 20:18
1
some times i study question outside og or gmatprep source.
this question is strange. i want to say something

choice A and E contain "rocket" without "a,the" . they are wrong.

if we read choice b,c and d, dont be confused by many phrases changing their places in the sentence. intead, just focus on what is the main core idea.

to get the core idea of sentence, ask ourself. which do which.

study effect of plume

is main core. and this is most logic.

from this point. i can go to the correct answer.
Re: With the private space industry at the early stages of launch   [#permalink] 30 Mar 2019, 20:18
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