.

— I have learned that it is not easy to get on well with the new boss.

—______? I think that I only need to do my own job well.

A．So what

B．what for

C．what if

D．how come

患者男性，59岁，声嘶伴咽部不适半年，痰中带血1个月。查体：甲状软骨膨大，右上颈部（Ⅱ区）可及大小约2cm×2.5cm质韧固定包块，无压痛。既往否认结核病史。患者行颈部MRI提示肿瘤位于声门上区，并侵及会厌前间隙、左侧咽壁、会厌及甲状软骨，左侧声带固定，口咽及咽旁无侵犯，上颈可见多个肿大淋巴结。直接喉镜病检提示声门上区中分化鳞癌。其他辅助检查未见转移。

根据相关检查，患者临床分期为（）。

A.cT1N1M0

B.cT2N1M0

C.cT3N2M0

D.cT4N2M0

E.cT4N3M0