A portfolio manager is evaluating the historical returns of three different mutual funds over the past five years. The annual returns (in %) are as follows:

Fund A: 5%, 7%, 10%, 3%, 6%

Fund B: 2%, 4%, 5%, 6%, 3%

Fund C: 8%, 9%, 7%, 6%, 5%

The portfolio manager wishes to determine which fund has the highest mean return over the period. Calculate the mean return for each fund and identify which fund has the highest mean return.