What makes calculating the adjusted cost base of a mutual fund complex? Some mutual funds can have dozens of securities, which makes it difficult to keep track of the original purchase price of the fund. B. The securities held in the fund when it is redeemed are not the same securities that were in the fund when it was originally purchased The adjusted cost base of a fund is made up of the price of the original units plus the cost of units purchased when the fund income is reinvested. D A mutual fund investor typically has a different tax rate each year, based on all the other income that the investor eared