High school students who feel that they are not succeeding in school often drop out before graduating and go to work. Last year, however, the high school's dropout rate was significantly lower than the previous year's rate. This is encouraging evidence that the program institute two years ago to improve morale of high student has begun to take effect to reduce dropouts.
which one of following, if true about last year, mostly seriously weaken the argument?
A. there is a recession that caused a high level of unemployment in the city.
B. the morale of students who drop of high school had been low even before they reach the high school.
C. as in preceding year, more high school students reminded in school than drop out.
D.high school established placement offices to assist their graduates in obtaining employment.
E.the antidropout program was primarily aimed at improving student's morale in those high schools with the highest dropout rates.
