Tom’s brother who is now a doctor always encourages        hard and go to college.

A．for him studying

B．him studying

C．for him to study

D．him to study

下列各项中，能正确表示正常男性体细胞和精子的染色体（条数）组成的是（　　）

A．44+XY和X、Y

B．44+XY和22+Y

C．22+XY和X、Y

D．44+XY和22+X、22+Y