[求助]prep2-88

88. (27190-!-item-!-188;#058&002269)

The number of applications for teaching positions in Newtown's public schools was 5.7 percent lower in 1993 than in 1985 and 5.9 percent lower in 1994 than in 1985.  Despite a steadily growing student population and an increasing number of teacher resignations, however, Newtown does not face a teacher shortage in the late 1990's.
Which of the following, if true, would contribute most to an explanation of the apparent discrepancy above?
A. Many of Newtown's public school students do not graduate from high school.
B. New housing developments planned for Newtown are slated for occupancy in 1997 and are expected to increase the number of elementary school students in Newtown's public schools by 12 percent.
C. The Newtown school board does not contemplate increasing the ratio of students to teachers in the 1990's.
D. Teachers' colleges in and near Newtown produced fewer graduates in 1994 than in 1993.
E. In 1993 Newtown's public schools received 40 percent more applications for teaching positions than there were positions available.

答案是E。

我一开始选了C，看了答案之后才觉得E是对的
但是依然不能坚定的干掉C，C为什么一定就错了呢？
谁能帮帮我，说一下这题的逻辑思路