In a particular year, Aggie Mutual Fund earned a return of 15% by making the following investments in the following asset classes: Weight Return Bonds 103 6% Stocks 903 16% The return on a bogey portfolio was 10%, calculated as follows: Weight Return 50% 5% Bonds (Lehman Brothers Index) Stocks (S&P 500 Index) 503 15% The contribution of security selection within markets to the total excess return was A. 1%. B. 3%. C. 4%. D. 5%