Math (DS)
What is the value of 
1. 
2.
Verbal (SC)
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic detriments of fertility.
(A) have to know a great deal more than now about the social and economic
(B) have to know a great deal more than they do now about the social and economical
(C) would have to know a great deal more than they do now about the social and economical
(D) would have to know a great deal more than they do now about the social and economic
(E) would have to know a great deal more than now about the social and economical
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Read the full article: GMAT Question of the Day (May 25): Arithmetic and Sentence Correction