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 (shared) for occupancy in 1987 and are expected to increase the number of elementary school students in Newtown’s public
C.The Newtown school board does not contemplate increasing the ratio of students to teachers in the 1990s
D.Teachers’ colleges in and near Newtown produced lower 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.
答案选A吧好像。。怎么解释啊。。。请NN们赐教！感激不尽！