from $1950$ to $2007,$ the average return in the stock market, as measured by the S&P $500,$ was $13\mathrm{.}2\%$ and a standard deviation of $17\%.$ Given this information, which of the following statements is correct?

a with an average return this high, it is unlikely that an investor will lose money in the stock market in the next $2$ years

b with a standard deviation this high, it is likely that an investor will lose money in some years over a $25$ year investment period

c this investment is not very good since the standard deviation is greater thatn the average return