Over the Past 84 Years, We Have Observed That Investments

Over the past 84 years, we have observed that investments with the highest average annual returns also tend to have the highest standard deviations of annual returns. This observation supports the notion that there is a positive correlation between risk and return. Which of the following

A) Small-company stocks, long-term corporate bonds, large-company stocks, long-term government bonds, U.S. Treasury bills.
B) Large-company stocks, small-company stocks, long-term corporate bonds, U.S. Treasury bills, long-term government bonds.
C) Small-company stocks, large-company stocks, long-term corporate bonds, long-term government bonds, U.S. Treasury bills.
D) U.S. Treasury bills, long-term government bonds, long-term corporate bonds, small-company stocks, large-company stocks.
E) Large-company stocks, small-company stocks, long-term corporate bonds, long-term government bonds, U.S. Treasury bills.