Rank the following three stocks by their level of total risk, highest to lowest. Rail Haul has an average of 10 percent and standard deviation of 15 percent. The average return and standard deviation of Idol Staff are 15 percent and 25 percent; and of Poker-R-Us are 12 percent and 35 percent.

Rail Haul, Poker-R-Us, Idol staff

Idol Staff, Poker-R-Us, Rail Haul

Poker-R-Us, Idol Staff, Rail Haul

Idol Staff, Rail Haul, Poker-R-Us