What are the students going to do during this clas

单项选择题

Questions 14-17 are based on a lecture in a college class. You now have 20 seconds to read Questions 14-17.

What are the students going to do during this class period

A．Watch a slide show about trees.
B．Learn how to prevent Dutch elm disease.
C．Study the history of the campus buildings and grounds.
D．Look at examples of trees on campus.