题目7单选题
设<img src="https://tihai-oss-cloud.itihey.com/img/3c4366dd2c9d12cb967f600785a13320.png">,<img src="https://tihai-oss-cloud.itihey.com/img/272db3598d7d516dbc8e7748dba4a636.png">,则<img src="https://tihai-oss-cloud.itihey.com/img/a174fb850acc9e8e13657a8b6edcdabf.png">( )A. {2,4}B. {6,8}C. {1,3}D. {1,2,3,4}