You have three Investment Choices:
1. Stock c with an expected return of 12% and a standard deviation of 20%
2. Stock d with an expected return of 18% and a standard deviation of 25%
3. A portfolio with 50% in stock c and 50% in stock D with their correlation coeffienct being .20
T-bills are yielding 3%. Using reward-to-volatility analysis, which of the three investments is preferable?