The Record of Investing in U

The record of investing in U.S.-based stock mutual funds

A) shows that the movements of the U.S.stock market account for about 20 percent of the fluctuations of the value of U.S.-based stock mutual funds.
B) shows that the talent of individual portfolio managers accounts for about 90 percent of the fluctuations of the value of U.S.-based stock mutual funds-luck the other ten percent.
C) shows that the movements of the U.S.stock market account for about 90 percent of the fluctuations of the value of U.S.-based stock mutual funds.
D) none of the options