、已知<Object: word/embeddings/oleObject12.bin>，集合<Object: word/embeddings/oleObject13.bin>，则<Object: word/embeddings/oleObject14.bin>（ ）。
A.A．<Object: word/embeddings/oleObject15.bin> B.<Object: word/embeddings/oleObject16.bin> C.<Object: word/embeddings/oleObject17.bin> D. <Object: word/embeddings/oleObject18.bin>
正确答案是B