下列选项中可以肯定PRL瘤的诊断的是（）

A.PRL＞300μg／L

B.PRL＞200μg／L

C.PRL＞150μg／L

D.PRL＞250μg／L

E.PRL＞100μg／L

________ I think he is Charles.

A．Who do you think he is

B．Do you think who he is

C．Whom do you think he is

D．Do you think who he is