GMAT Sentence Correction (SC) | Re: As a result of the Black Death, the plague that afflicted

As a result of the Black Death, the plague that afflicted Europe in 1348-49,as many as half the population died and less than half the workforce remained in certain cities.

a- as many as half the population died and less than half the work force remained

b- as much as half the population died and fewer than half the work force remained

c- as many as half the people died and less than that remained in the work force

d- as much as half the population died and less than half the work force