男性，50岁，脓血便半年余，纤维结肠镜发现距肛门11cm处直肠前壁有一分叶状息肉，直径lcm，基底宽，病理证实为直肠息肉恶性变，手术方式应选择（）

A.腹会阴联合直肠癌根治术

B.经腹直肠癌切除术

C.经肛门局部切除术

D.乙状结肠造瘘术

E.骶后径路局部切除术

First-aid experts stress that knowing what to do in an emergency can often save a life, specially in accident cases.