Answer:
e) Increase the required rate of return used to evaluate the project to reflect the higher risk of the project
Explanation:
As per the basic concept of investment, "higher the risk, higher the return".
Thus, an investor assumes a higher risk only in the scenario wherein the expected return would be commensurate with such risk. Investor would only invest in a risky asset when the return derived can compensate him for the excess risk assumed.
Required rate of return is an investors expectation of return from a project also referred to as the cost of capital.
So for the purpose of evaluating the project, the investor should use a higher required rate of return to signify higher risk which would reveal the true viability of the project.