Education is a good investment for an individual if a. the discount rate is above zero.
b. workers with higher levels of education tend to earn higher wages.
c. given the individual’s discount rate, the present value of the benefits of the investment are greater than or equal to the present value of the costs of the investment.
d. None of these answers is correct.
e. All of these answers are correct.

The correct answer is the option E: All of these answers are correct.

Explanation:

On the one hand, the discount rate is the name given to the interest rate charged to the commercial banks and also to other financial institutions for the loans they take from the Federal Reserve Bank of The United States.

On the other hand, the education is always a good investment for the individuals in the cases where the workers with higher levels of education tend to earn higher wages and that obviously stimulates the action of study for one's future and also in the cases where the discount rate is favourable to the person and that will happen when is above zero or the number it releases shows that the present value of the benefits are equal or higher than the present value of the costs of the investment.

answer; /// the above statement is (false);

answer/// product differentiation;