You have a portfolio with $5,000 invested in Stock A with a beta of 0.9, $8,000 in Stock B with a beta of 1.8, and $10,000 in Stock C with a beta of 2.0. What is the beta and return of the portfolio? A. beta = 1.78, Return = 9.80% B. beta = 1.69, Return = 12.15% C. beta = 1.57, Return = 9.28% D. beta = 1.78, Return = 14.9%