David is wanting to grow his money is considering three investment projects which are known as investment a, investment b, and investment c. each investment requires an initial purchase of $10,000. investment a offers an expected rate of return of 12%, investment b a return of 5%, and investment c of 10%. david wants to make the investment and decides that he will cash in a certificate of deposit that is currently earning 7% return. which investment should david not purchase because he would lose money? a) investment a b) investment b c) investment c d) neither investment