Which of the following statements is NOT true?

Select one:

a. Positive NPV is considered as an economic rent.

b. Focusing on a market niche can help firms enjoying the positive NPV opportunities.

c. A company with economy of scale is less likely to maintain the positive NPV opportunities, all other things equal.

d. In equilibrium, NPV of an investment is zero as competition will drive away any abnormal profit in an investment.

e. It is fruitful for a company to try to differentiate its goods/services as it would allow them to maintain the positive NPV opportunities.