This question is from MGMAT CAT
Poor weather in early 14th-century Europe created meager harvests, causing the result of mass starvation in some areas and the elimination of as many as 15 percent of the population.
A) causing the result of mass starvation in some areas and the elimination as many as
B) causing the result of mass starvation in some areas and eliminating as much as
C) resulting in mass starvation in some areas and the elimination of as much as
D) and resulted in mass starvation in some areas and the elimination of as many as
E) causing mass starvation in some areas and the elimination of as many as
Explanation says that "as many as" refers to a portion of the "population," which is an uncountable noun (i.e., one cannot say "one population, two population"); hence, the correct expression here is "as much as" rather than "as many as."
However I think "15% of population" is a countable thing and not non-countable. Moreover "causing mass starvation" is more concise than "resulting in mass starvation".
Please elaborate why "15% of population" in non-countable.