A pension portfolio manager is about to upgrade his performance calculation software. Currently, his performance software will only calculate his performance on a quarterly basis. The quarterly performance numbers calculated on a money-weigh ted rate-of- return basis for the year 2017 are shown below. The portfolio benchmark has annual return of 4.2 percent and the market index has a return of 3.4 percent. QUATER RETURN 1 5.35% 2 -2.34% 3 4.62% 4 1.25% Calculate the rate of return for 2017 Select one: a. 8.98% b. 2.17% C. 4.15% d. 6.33%