please help. thank you!

1. The return on an asset over a period between portfolio revisions is called A) a holding period return B) a market return C)a risk-free return D)an instantaneous return 2. The risk-free rate is usually approximated by A) the return on bank savings accounts B) the retum on Treasury bills C) the return on money market mutual funds D) None of the above 3. The market risk premium is defined as A)the difference between the return on an index fund and the return on Treasury bills B)the difference between the return on a small firm mutual fund and the returnon the Standard and Poor's 500 index C)the difference between the return on the risky asset with the lowest returns and the return on Treasury bills D)the difference between the return on the highest yielding asset and the lowest yielding asset