​If Two Accountants Have Had the Same Education, Amount of Experience

​If two accountants have had the same education, amount of experience, and 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 earn the same amount of money, even though one accountant is more productive than the other.
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.