The Treynor-Black model does not assume that Select one: A. the objective of security analysis is to form an active portfolio of a limited number of mispriced securities B. the optimal weight of a mispriced security in the active portfolio is a function of the degree of mispricing, the market sensitivity of the security, and its degree of nonsystematic risk OC. the cost of less than full diversification comes from the nonsystematic risk of the mispriced stock OD. indexing is always optimal