Bill currently holds a well-balanced portfolio of financial assets. He has just learned that he has inherited some financial assets with a beta value of zero from his great-uncle. If he is mostly concerned about the riskiness of his portfolio, should Bill keep these assets or should he sell them right away?

Select one:

a. He should get rid of them because they are worthless and will diminish the value of his portfolio.

b. He should sell them and invest the proceeds in an asset with a positive beta.

c. He should keep them even though they will increase the variability of his portfolio.

d. He should keep them because they are risk-free assets.

e. He should get rid of them because they will increase the variability of his portfolio.