Guy Is Very Conservative in His Investing and Holds Mostly

Guy is very conservative in his investing and holds mostly government savings bonds and bank GICs.What type of investment would you recommend to Guy if he says he wants to move up one notch in risk?

A) Medium-quality preferred stock and high-grade corporate bonds
B) Commercial paper and lower-quality common stocks
C) High-grade corporate bonds and commercial paper
D) Commercial paper and medium-quality preferred stocks
E) Junk bonds and high-grade corporate bonds