[求助]请教白勇语法里面的一道题~~有点困惑

yoyblue

A wildlife expert predicts that the reintroduction of the caribou into northern Minnesota
    would fail if the density of the timber wolf population in that region is more numerous than one wolf for every 39 square miles.

(A) would fail if the density of the timber wolf population in that region is more numerous than

(B) would fail provided the density of the timber wolf population in that region is more than

(C) should fail if the timber wolf density in that region was greater than

(D) will fail if the density of the timber wolf population in that region is greater than

(E) will fail if the timber wolf density in that region were more numerous than

最后的答案是D项，我比较困惑的是the density of the timber wolf population 这种说法，不应该是the density of the timber wolf 么？

yoyblue

拜托各位帮忙解答一下~~大谢~~

aeoluseros

人口密度：the density of population

yoyblue

呃~~这样哦~~这两天复习的头都大了~~

以前记得的现在全都不确定了~~

呵呵，谢谢版主~~^^