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# Art historians are using a process known as infrared

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Senior Manager
Joined: 12 Mar 2006
Posts: 365
Schools: Kellogg School of Management
Art historians are using a process known as infrared [#permalink]

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22 Oct 2006, 21:05
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Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.
(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done
VP
Joined: 21 Aug 2006
Posts: 1016

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22 Oct 2006, 21:07
"Whether" is necessary. "Has been" and "Had been" are unnecessary.

I would bet on D
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Manager
Joined: 04 Feb 2004
Posts: 70
Location: India

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22 Oct 2006, 22:13
"since completion" calls for a perfect tense - I'll go for C
VP
Joined: 15 Jul 2004
Posts: 1445
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)

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23 Oct 2006, 03:30
Another vote for C. IMO there's a very subtle difference between these two constructions -

The present perfect (HAS BEEN) denotes the action could have happened anytime in the past including the immediate present. The simple past (WAS) denotes it MUST have happened in the past - but there's no reason to believe it must necessarily have happened in the past.

Second - "a practice employed" is more structurally appropriate than "as was done" ( at least so it appears to the ear)
Director
Joined: 23 Jun 2005
Posts: 841
GMAT 1: 740 Q48 V42

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23 Oct 2006, 04:31
prude_sb wrote:
Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.
(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

C.
whether - more appropriate. A and B out.
since - implies from past till now - so, "has been" is more appropriate. Only C stands, but I have trouble with the last part (highlighted). What was done by artists of the time - Da Vinci sketching figures in black? Certainly not, but the construction seems to imply that. D is better in this aspect.
Intern
Joined: 23 Aug 2006
Posts: 8

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29 Oct 2006, 23:40
I am for 'C'.

'D' is out because 'whether it was altered since completion' is a wrong construction. Typically 'since' is preceded by 'had been or has been' depending upon the time of action.

Thanks.
29 Oct 2006, 23:40
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