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

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

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

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

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