问题详情

A team of American and Canadian scientists discovered that
A．underwater explosions caused whales" losing of their hearing.
B．some of the whales died as a result of seawater pollution.
C．only whales could stand the noise caused by explosions.
D．whales" ears bled and became infected as a result of unknown illness.请帮忙给出正确答案和分析，谢谢！