Little Tommy was reluctant to tell the schoolmaster__________he had done the day before.

A．that

B．how

C．what

D．where

甲系某医院外科医师，应邀在朋友乙的私人诊所兼职期间，擅自为多人进行了节育复通手术。对甲的行为应当如何定性

A．构成非法行医罪

B．构成非法进行节育手术罪

C．构成医疗事故罪

D．不构成犯罪