Two Accountants Have the Same Amount of Education and Experience

Two accountants have the same amount of education and experience.If they work at the same type of job for the same profit-maximizing firm,which charges its clients a uniform hourly fee,then _____

A) they should both earn the same amount of money.
B) the one whose job is less risky should be paid more.
C) the one whose job is riskier should be paid less.
D) the one who has a higher marginal product should be paid more.
E) the one who has a higher marginal product should be paid less.