that the government can lead them out of the financial crisis people are optimistic about

问题补充：

that the government can lead them out of the financial crisis,people are optimistic

about the future of the country.

A. Convincing

B. Convinced

C. To convince

D. Having convinced

答案：

A. Convincing

B. Convinced

C. To convince

D. Having convinced

解析：考查非谓语动词。这句话中的convince和句子的主语people是动宾关系，因此用过去分词。