The financial crisis and the suffering has caused have a great influence on the
whole world.
A. they
B. which
C. it
D. what
网友回答
A. they
B. which
C. it
D. what
解析： 解答本题的关键是搞清句子的主干，即：The financial crisis and the suffering
have a great influence on the whole world.
it has caused显然是一个省略了that/which的 定语从句。句意为：金融危机及其造成的危害给全球带来了巨大的影响。