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Director
Joined: 25 Aug 2007
Posts: 926

Kudos [?]: 1543 [0], given: 40

WE 1: 3.5 yrs IT
WE 2: 2.5 yrs Retail chain

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18 May 2010, 23:58

I think this study is published later. So, past perfect tense makes sense here.
Well, even I marked A by PoE and consider the above point to zero-in on A.
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Kudos [?]: 1543 [0], given: 40

Joined: 19 Feb 2010
Posts: 390

Kudos [?]: 201 [0], given: 76

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19 May 2010, 03:21
I think the use of the past perfect tense is not related to the verbs "published" or "born". The people "had suffered" depression by the age of ..., or before becoming..., or by the time... six percent "had become depressed" by age...
They become depressed before becoming "so many years of age".
I had grown 170 cm before my 17th birthday.
I had grown 170 cm by the age of 17.

Kudos [?]: 201 [0], given: 76

Intern
Joined: 15 Jul 2009
Posts: 41

Kudos [?]: 17 [0], given: 0

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27 Jun 2010, 17:18
What is the shortest way to identify the correct answer in this one? All the alternatives were very different and without a careful reading and elimination of options, it is just impossible to arrive at the OA
[Reveal] Spoiler:
A

Kudos [?]: 17 [0], given: 0

VP
Joined: 16 Jul 2009
Posts: 1483

Kudos [?]: 1500 [0], given: 2

Schools: CBS
WE 1: 4 years (Consulting)

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17 Sep 2010, 11:04
I think that Past Perfect is not needed, but htere is no better option than A.
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Kudos [?]: 1500 [0], given: 2

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