Whats the main idea of the news item？A．Japan"s economy will be slowed down.B．Japan"s credi

Whats the main idea of the news item？

A．Japan"s economy will be slowed down.

B．Japan"s credit rating is ignored by Prime Minister.

C．Credit rating for Japanese government debt is lowered.

D．Japan"s budget deficits are large.

请帮忙给出正确答案和分析，谢谢！