题目1单选题
下列化合物发生亲电取代反应时活性最大的是( )A. <img src="https://tihai-oss-cloud.itihey.com/img/42643903de58d919d2839b97789b07f3.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/ba276760d5a9928983f224dce98ccd78.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/f77cbafc827a12180e948a12fb9d98bf.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/82840c22d3bba79746d871f6f7bfa1d8.png">