The radio was too noisy. Would you turn ___  __ a little, please?

A．down it

B．it down

C．it off

D．off it

女性，68岁，无吸烟史，咳嗽1个月，胸痛2周。胸部X线及CT示：右下肺周围型占位，伴胸膜凹陷征；头颅CT示：颅腔占位，转移性肿瘤可能，考虑肺癌脑转移，其肺部肿瘤最可能的病理类型为（）

A.腺癌

B.鳞癌

C.小细胞未分化癌

D.类癌

E.大细胞癌