单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.
What is probably true about the students in this course

A.They are students at a community college.
B.They plan to apply to medical school.
C.They are pursuing various fields of study.
D.They have never taken a science course befor