Compute the Standard Deviation of a Variable from Raw Data $12 \%$

Compute the Standard Deviation of a Variable from Raw Data
-Over the last 10 years four mutual funds all had the same mean rate of return, $12 \%$ . These mutual funds had different standard deviations as follows: Mutual Money 8\%, Co-joined Investments $6 \%$ , Together Fund $4 \%$ , All for One Fund $9 \%$ . Which mutual fund investment is the most consistent in rate of return?

A) Together Fund
B) Mutual Money
C) Co-joined Investments
D) All for One Fund