The implication for investors of efficient markets is that if they really are efficient:(Select the best choice below.)

A. Investors cannot earn a profit even if they have inside, private information that has not been released to the public.

B.Investors should watch and read every possible investing source prior to buying stock.

C. Truly skilled investors should be able to earn unusually high returns by picking winners more often than other investors.

D. Investors should not expend resources picking stocks since all will represent fair values.