Whom is the passage aimed at

A．He doesn’t know how to use a computer.
B．He doesn’t want to write the paper.
C．He needs to get an office job.
D．He has been working for a long time.

A．Because she has more voluntary muscles than an average man.
B．Because 30 to 40 percent less muscle for her body mass than a man.
C．Because 60 to 70 percent less muscle for her body mass.
D．Because less muscle fiber for her body weight.