A portfolio manager is looking at three different securities. A has an expected return of 10%, B an expected return of 9%, and C an expected return of 8%. The correlation between A & C is .8, between B & C -.6 and between A & C 0. If the managers mandate is to maximize his return, which of the following securities or combinations of securities makes the most sense? a) A only b) A & B only c) A & C only d) Insufficient information 7.