S&S stock is expected to return 17.5 percent in a booming economy, 12.4 percent in a normal economy, and 1.2 percent in a recession. The probabilities of an economic boom, normal state, or recession are 2 percent, 90 percent, and 8 percent, respectively. What is the expected rate of return on this stock? A. 11.89 percent B. 12.56 percent C. 12.43 percent D. 11.61 percent E. 10.50 percent