【单选题】听力原文: Not only farmers but also scientists have studied weather forecasting. People for many centuries and in all countries have studied the weather and tried to make weather forecast. Sometimes dista...
A.
Because both farmers and scientists try. to make weather forecast.
B.
Because people in all countries make weather forecast.
C.
Because it is easy to make weather forecast.
D.
Because he wants to make it clear how important to make weather forecast.