The U.S. beta and world beta of IBM are 1 and 0.8 respectively. The U.S. market return and world market returns are both 12%, and the risk-free rate 6%. The variances of U.S. market and world market are also same. What can you conclude Select one: O a. IBM's cost of equity in domestic market is 10% O b. IBM's global cost of equity is 12% c. IBM's cost of equity remains same both globally and domestically d. The covariance between IBM's return and world market is lower than the covariance between it's return and U.S market