Calculate the Coefficient of Variations of the following stocks and then rank them least risky to most risky: Rail Haul has an average retum of 12 percent and standard deviation of 25 percent. The average return and standard deviation of Idol Staff are 15 percent and 35 percent; and of Poker-R-Us are 9 percent and 20 percent. A Rail Haul CoV -0.48, Poker-R-Us CoV -0.45, and Idol Staff Cov -0.43 B. Idol Staff CoV = 0.43, Poker-R-Us CoV -0.45, and Rail Haul CoV 0.48 C. Rail Haul CoV = 2.08, Poker-R-Us CoV = 2.22, and Idol Staff CoV = 2.33 D. Poker-R-Us CoV - 4.96, Rail Haul CoV = 5.22, and Idol Staff CoV = 7.63 E Idol Staff CoV = 2.33, Poker-R-Us CoV - 2.22, and Rail Haul CoV = 2.08