Final answer:
Over time, the average return of stocks is higher than that of bonds, and the average return of bonds is higher than that of a savings account. So, the correct answer is option 2.
Step-by-step explanation:
Over a sustained period of time, stocks have an average return higher than bonds, and bonds have an average return higher than a savings account. This is because in any given year the value of a savings account changes very little. In contrast, stock values can grow or decline by a very large amount (for example, the S&P 500 increased 26% in 2009 after declining 37% in 2008).
The value of a bond, which depends largely on interest rate fluctuations, varies far less than a stock, but more than a savings account.
So, the correct answer is option 2.