hello, i have gotten this question wrong 3 times

Which of the following statements is CORRECT? O If the risk-free rate rises, then the market risk premium must also rise. C If a company's beta is halved, then its required return will also be halved. C If a company's beta doubles, then its required return will also double. O The slope of the security market line is equal to the market risk premium, (IM - IRF). O none of the above