、已知集合<Object: word/embeddings/oleObject31.bin>，集合<Object: word/embeddings/oleObject32.bin>，则<Object: word/embeddings/oleObject33.bin>（ ）。
A.A．<Object: word/embeddings/oleObject34.bin> B.<Object: word/embeddings/oleObject35.bin> C.<Object: word/embeddings/oleObject36.bin> D. <Object: word/embeddings/oleObject37.bin>
正确答案是C