Suppose you are an investor with a choice between three securities that are identical in every way except in terms of their rates of return and risk. Which investment has the lowest risk, as measured by standard deviation.

Investment A:	Total return = 5 percent with probability 50 percent
	Total return = 15 percent with probability 50 percent
Investment B:	Total return = 8 percent with probability 50 percent
	Total return = 12 percent with probability 50 percent
Investment C:	Total return = 0 percent with probability 90 percent
	Total return = 2 percent with probability 10 percent

		Investment A
		Investment B
		Investment C
		All of the above have the same risk.