Answer:
b-The required return on Stock A will increase by less than the increase in the market risk premium, while the required return on Stock C will increase by more than the increase in the market risk premium.
Explanation:
Beta reflects the risk associated, as the beta is low, the expected risk is also low, accordingly return expected is also keeping all things constant.
When Beta is less than 1 it means the returns will be lower than market, accordingly for Stock A the return will increase but slower than the market risk.
Whereas, the Beta is more than 1 of Stock B and accordingly the risk is more but return will grow even faster as the risk volatility is high than the market risk.