TOEFL Listening: TPO-TOEFL听力TPO - YTHAT1P3987ONWJ8R$

Why does the professor say this: A. To make sure the student knows he'll have to be familiar with topographical features for the final exam B. To remind the student of a diagram that she presented in class C. To point out the severity of weather conditions near the lakeshore D. To reinforce the connection between her example and the student's question