If current trends continue, by the year 2010 carbon emissions in the United States will soar to a level more than one-third higher than were those in 1990, according to official projections.
A. will soar to a level more than one-third higher than were those
B. will soar to a level more than one-third higher than that
C. would soar to a level more than one-third higher than is was
D. would soar to a level more than one-third higher than those
E. would soar to a level more than one-third higher than they were

I dont see why E is wrong - I eliminated AB and picked E - but looking @ the OA ( A ) I guess I did something wrong

Can someone explain me the difference between the usage of will and would and when are they used correctly?
I seem to get all questions testing this concept wrong

Thanks

OA is B
Have fun passing through the circuitous route :
http://www.manhattangmat.com/forums/if-current-trends-continue-t2055.html

;-)

good catch tathagat. if anyone has a follow-up post to this one, please follow tathagat's link (and the link inside that link) to post your question, thereby ensuring that all posts on a question go to the same place. thanks.