Questions 17-20 refer to the following table of information about the returns (in percentage form) to an investment in A Port and the Market Index over the first six months of the year. Year A Stock Market 1 4 10 2 2 5 3 7 16 4 6 14 5 1 5 Average 4 10 Variance 5.2 20.4 Which is closest to the market beta of the investment A Stock? O A. -1.5 OB. -0.5 OC. 0.5 OD. 1.5