A stock has annual returns of 5 percent, 21 percent, -12 percent, 7 percent, and 6 percent for the past five years. The arithmetic average of these returns is percent while the geometric average return for the period is percent. O A. 5.80; 4.86 O B. 5.80; 5.03 O c.5.40; 5.03 O D.5.40; 4.86