We know from research that male traders tend to take riskier positions than female traders. Evidence has also determined that: O a. Male traders earn higher returns, in line with expectation that higher risk means higher return O b. Research has not been able to distinguish returns between male and female traders O c. Female traders earn lower returns, in line with expectation that lower risk means lower return Od Male traders earn lower returns O e. Male and female traders earn about the same returns The Treynor-Black model is mostly likely to be utilized by a fund manager of: a. O b. O c. an enhanced index portfolio. a passive portfolio. a market portfolio. an active portfolio a health-care portfolio. O d. O e