According to the first two paragraphs, which has the least probability to happen on mentally troubled undergraduates?

D
事实细节题。根据题干提示定位至前两段。由第一段末句中的比例可知考虑自杀的学生比例最小为1/10，接着在第二段中just 8.5 percent of students used their college’s counseling services…students were more likely to consider killing themselves than to seek help.可知寻求咨询的比例比考虑自杀的学生还要低，即他们最不可能去心理咨询，故答案是D。