Between 1990 and 2000 the global economy grew more than it did during the 10,000 years from the beginning of agriculture to 1950.

B. Between 1990 and 2000 the global economy grew more than that during 10,000 years, from when agriculture began

C. The growth of the global economy between 1990 and 2000 exceeds that which has been for 10,000 years from the beginning of agriculture

D. The growth of the global economy between 1990 and 2000 exceeds what it has been for 10,000 years, from when agriculture began

E. The growth of the global economy between 1990 and 2000 exceeded what it did for 10,000 years from the beginning of agriculture

OA: A

Can someone explain me this one.

thanks

B. Between 1990 and 2000 the global economy grew more than that during 10,000 years, from when agriculture began - The logic of the sub-ordinate clause - agriculture began ...during 10,000 years is wrong.

C. The growth of the global economy between 1990 and 2000 exceeds that which has been for 10,000 years from the beginning of agriculture - 1.Exceed - used for abstract form of comparison - 'Her performance exceeded our expectations'. Here growth is essentially a numeric figure.2.Tense - Declarative sentence - 2 events.Previous growth figure since 10k years has seized to exist,as it has been replaced by new figure.So had been should come into play.

D. The growth of the global economy between 1990 and 2000 exceeds what it has been for 10,000 years, from when agriculture began - Use of from is wrong.Since is better as an event of past is brought into present for comparison.Also the above mentioned reasonings apply.

E. The growth of the global economy between 1990 and 2000 exceeded what it did for 10,000 years from the beginning of agriculture - Use of did is wrong.Did is past participle form of do verb.Growth has indeed not performed any action as such.

That leaves A.

I leave the floor open for discussion,as my reasonings might be incomplete.
Thanks

This qs is from GMATPrep

Ron, Can you please explain this one.

see here

since-1990-the-global-economy-has-grown-more-than-it-did-t552.html

weirdly enough, it appears that these two questions are identical other than in the very first words.