George and Lora are an elderly couple and are both retired. Which one of the following sets of portfolio statistics might best suit their situation if their main investment goal is acceptable income with low risk? O A. beta = 2, expected return = 10% OB. beta = 0.5, expected return = 10% C. beta = 5, expected return = 10% OD. beta = 0.5, expected return = 1% O E. beta = 1, expected return = 10%