Why doesnt the man believe that weather is responsible for the recent events？A．No melting

Why doesnt the man believe that weather is responsible for the recent events？

A．No melting has been observed.

B．The past several winters have been unusually severe.

C．Nothing unusual has happened in other parts of Antarctica.

D．The ice shelf had remained intact for centuries despite the weather.

请帮忙给出正确答案和分析，谢谢！