Security A has an expected return of 7%, a standard deviation of returns of 35%, a correlation coefficient with the market of -0.3, and a beta coefficient of -1.5. Security B has an expected return of 12%, a standard deviation of returns of 10%, a correlation with the market of 0.7, and a beta coefficient of 1.0. Which security is riskier? Why?

Please explain better than the other, same, questions which have been answered with the same cut-and-paste answer. It only asks for which one is riskier, it does not specify what type of portfolio it is in. Thanks!