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# Just before its return to Earth from Mars, the “sick” robotic rover

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Director
Joined: 22 Feb 2018
Posts: 736
Just before its return to Earth from Mars, the “sick” robotic rover  [#permalink]

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11 Jan 2020, 00:43
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Difficulty:

45% (medium)

Question Stats:

55% (01:12) correct 45% (01:25) wrong based on 88 sessions

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Just before its return to Earth from Mars, the “sick” robotic rover missed revealing the existence of significant organic compounds when it was present and indicated that they existed when they were actually absent.

A) when it was present and indicated
B) when it was present, indicating
C) that was present and indicated
D) when present, which indicated
E) when they were present and indicated
Manager
Joined: 28 Jun 2018
Posts: 135
Location: Portugal
GMAT 1: 700 Q49 V35
GPA: 3.92
Re: Just before its return to Earth from Mars, the “sick” robotic rover  [#permalink]

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11 Jan 2020, 03:47
Raxit85 wrote:
Just before its return to Earth from Mars, the “sick” robotic rover missed revealing the existence of significant organic compounds when it was present and indicated that they existed when they were actually absent.

A) when it was present and indicated
B) when it was present, indicating
C) that was present and indicated
D) when present, which indicated
E) when they were present and indicated

Option E

The sentence says that just before it returned from Mars to Earth, the robotic rover got ‘sick’: i.e., it did not function correctly. It did not reveal the existence of significant organic compounds.
The phrase “significant organic compounds” is followed by “when it was present”. Logically, the sentence should state that the rover missed revealing these compounds when they were present. So, we need to infer the correct meaning here because “it” is used incorrectly. So, the meaning of the sentence is that the rover missed showing these compounds when they were present and indicated that they were there when they were not present.

Raxit85 wrote:
A) when it was present and indicated
As found in the meaning analysis, the singular pronoun “it” does not agree in number with the plural antecedent “compounds”. This error also leads to a subject-verb agreement error in the use of the singular verb “was”.
Raxit85 wrote:
B) when it was present, indicating
This choice also has the pronoun-antecedent number agreement error as in Choice A. Furthermore, the comma + verb-ing modifier “indicating” incorrectly modifies the preceding clause. As per the original sentence, this action should be parallel to the verb “missed”.
Raxit85 wrote:
C) that was present and indicated
The singular modifier “that was” incorrectly refers to the plural noun “compounds”.
Raxit85 wrote:
D) when present, which indicated
There is no preceding noun to which the relative pronoun modifier “which” can refer.
Raxit85 wrote:
E) when they were present and indicated
This is the correct answer choice. It clearly and precisely communicates the intended meaning of the sentence.
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Re: Just before its return to Earth from Mars, the “sick” robotic rover   [#permalink] 11 Jan 2020, 03:47

# Just before its return to Earth from Mars, the “sick” robotic rover

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