The S&P 500 index delivered a return of 25%, 15% - 30%, and -10% over four successive years. What is the arithmetic average annual retum per year? OA. 3% OB. 5% C. 0% OD. -5% Click to select your answer build Type here to search 3 RI hp esc 40 @ 7 2 # 3 $ 4 % 5 6 lab G