I need a well worded correct answer to the following questions please help

1. (5 Pts.) When evaluating which measure of risk should be rewarded in the market, one should look at the standard deviation of the security return because it measures the dispersion from the expected return. True, false, uncertain explain?

2. (5Pts.) Diversification is beneficial to investors because it allows them to reduce risk without sacrificing any returns. True, false, or uncertain. Explain