match the description with the correct risk measure. - measures total return variability; includes systematic and unsystematic influences on asset returns. - measures only systematic risk; a stock's volatility relative to the market. - provides insight to the strength and direction two assets' returns move relative to each other. - measures how well diversified your portfolio is. - measures how much two assets move together. - measures risk per unit of return. a. standard deviation b. correlation c. covariance d. coefficient of variation e. r-squared f. beta