A portfolio has three stocks - 320 shares of Yahoo (YHOO), 300 shares of General Motors (GM), and 50 shares of Standard and Poor's Index Fund (SPY). If the price of YHOO is $20, the price of GM is $30, and the price of SPY is $150, calculate the portfolio weight of YHOO and GM. O A. 14%, 23.6% OB. 21%, 33.4% OC. 27.9%, 39.3% OD. 27.9%, 51.1%