Each Individual Mutual Fund Hires an Investment Advisor, Generally from the Management

Each individual mutual fund hires an investment advisor, generally from the management company, who oversee the particular fund. How is this advisor paid?

A) hourly
B) based on a percentage of the commissions charged on an annual basis
C) based on a percentage of the total value of the fund on an annual basis
D) annually based on the capital gains realized by the fund
E) none of the above