Rank in Ascending Order (Lowest to Highest) the Relative Riskiness

Rank in ascending order (lowest to highest) the relative riskiness of the various types of corporate and government securities.

A) common stock, preferred stock, corporate debt, long-term government debt
B) corporate debt, long-term government debt, preferred stock, common stock
C) long-term government debt, corporate debt, preferred stock, common stock
D) corporate debt, preferred stock, long-term government debt, common stock