你的题选项应该有误。我网上查的应该是正确的。应该选of which influenced. influence为及物动词，不应该有on，因此你的选项C应该去掉on。

1) After the First World War, the author Anais Nin became interested in the art movement known as Surrealism and in psychoanalysis , both ________ her novels and short stories .

A. in which the influence

B. of which influenced

C. to have influence

D. its influence in

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