问题详情

What is the main idea of the news item？
A．The new broadened mediation effort is favored by Robert Mugabe.
B．The mediations will be continued by Thabo Mbeki under supervision.
C．Mr. Mbeki is faced with a lot of international pressure for being biased.
D．Mr. Mbeki"s role as a mediator is replaced by the United Nations.请帮忙给出正确答案和分析，谢谢！