GMAT PREP (SC)

Question

Please explain...

sharonluo33 · Answer

B,coz it is not wordy, and the comparison is well articulated

sharonluo33 · Answer

you can't use 'that' in this sort of construction, because constructions using 'that of' (or other preposition after 'that') must have EXACTLY parallel structures. in other words, if the second half says 'that during 10,000 years', then the preceding half must say 'the growth of ___ during something else' (or some other time preposition, such as before or after, in place of during).

there's nothing ungrammatical about 'from when', because the clause starting with 'when' is a perfectly legitimate noun clause (i.e., 'when agriculture began' serves as a noun. however:
- it's possible that the gmat does consider such constructions wrong; the only way to tell is to see if they say so in any official answer choices
- regardless of where the gmat stands on the issue, 'the beginning of agriculture' is unquestionably better than 'when agriculture began' (i.e., an actual noun is almost always superior to a circuitous noun clause, when possible)
 From Manh

LM · Answer

Incorrect answer, and waiting for someone who could explain it well!!

sasen · Answer

A seems to a concise and clear answer

B: wordy and unidiomatic
C,D,E all have incorrect and ambiguous pronouns usage

sharonluo33 · Answer

OA IS A, guess it is the parallel that matters here

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