An individual has 10,000 capital to invest in the stock market. He invests 30% of his capital in stock A, 25% in stock B and 45% in Stock C. What is the return on his/her portfolio assuming that the simple returns on stocks A, B and C are 5%, 10% and 12%, respectively? Select one: a. 9.3% b. 9% c. 9.7% d. 9.0%