Which of the following inputs is most likely required for the Markowitz efficient frontier? The: * Beta level of risk aversion in the market industry effects covariation between all securities Using the following correlation matrix, which two stocks would combine to make the lowest-risk portfolio? (Assume the stocks have equal risk and returns.) * B Stock A B c A +1 -0.59 +1 009 C and C C and B. A and A A and C A and B. B and B