Yeadon construction's stock is expected to earn 5 percent in a weak economy, 12 percent in a normal economy, 20 percent in a strong economy, 30 percent in a booming economy, and lose 20 percent in a recession. The probability of a recession is 5 percent, the probability of weak economy is 15 percent, the probability of a normal economy is 48 percent, the probablity of a strong economy is 27 percent, and the probability of a booming economy is 5 percent. What is the expected rate of return on this stock? A. 15.17% B. 16.72% C. 11.66% D. 13.41% E. 12.41%