Which of the Following Is the Correct Order of Corporate

Which of the following is the correct order of corporate issues based on risk and return? (most risk-return to least risk-return)

A) common stock, subordinated debentures, secured debt, treasury bills
B) preferred stock, common stock, subordinated debentures, secured debt
C) common stock, long-term government bonds, secured debt, subordinated debt
D) common stock, secured debt, subordinated debentures, preferred stock