Which One of the Following Is a Correct Ranking of Securities

Which one of the following is a correct ranking of securities based on their volatility over the period of 1926-2010? Rank from highest to lowest.

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