．To deal with the global financial crisis, China ______ the international community to help developing countries．

A．called on

B．called up

C．called in

D．called for

请结合给定资料中反映的现实问题，自选角度，自拟标题，用1000字左右的篇幅写一篇文章。
[要求] 联系实际，观点明确，条理清晰，论据充实，语言通畅。