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Since the path-breaking discovery, just over fifty years ago

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Manager
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Since the path-breaking discovery, just over fifty years ago [#permalink]

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05 Mar 2014, 07:31
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Difficulty:

15% (low)

Question Stats:

77% (01:51) correct 23% (00:39) wrong based on 47 sessions

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Since the path-breaking discovery, just over fifty years ago, of the structure of the DNA molecule, scientists have made astounding progress to understand and manipulate this most important of biological molecules

A. scientists have made astounding progress to understand and to manipulate
B. scientists have made astounding progress in understanding and manipulating
C. astounding progress has been made by scientists to understand and to manipulate
D. scientists made astounding progress in understanding and manipulating
E. astounding progress was made by scientists in understanding and manipulating
[Reveal] Spoiler: OA

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Senior Manager
Joined: 12 Mar 2010
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Concentration: Marketing, Entrepreneurship
GMAT 1: 680 Q49 V34
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Re: Since the path-breaking discovery, just over fifty years ago [#permalink]

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05 Mar 2014, 12:10
IMO B for the below reasons.

A. Usage of infinitive is wrong here. Because it hints that the progress was made with an objective to understand and manipulate the molecule.
B. Correct
C/E. passive voice is not required and is incorrect here
D. 'have made' is required as the progress is still happening (usage of Since)
Re: Since the path-breaking discovery, just over fifty years ago   [#permalink] 05 Mar 2014, 12:10
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