To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economi
c determinants 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 economic
A. Short words and hard consonants create a sense of angry uncertainty. The repetition of the phrase causes the reader to consider the rhetorical question in the context of the text.
