问题详情

Which of the following is true？
A．People have done nothing to get rid of the tsetse flies.
B．People are trying to find out ways to get rid of the tsetse flies.
C．No ways can be found to get rid of the tsetse flies.
D．It won"t be long before people get rid of all the tsetse flies in Africa.请帮忙给出正确答案和分析，谢谢！