Rank the following three stocks by total risk level, highest to lowest. Kappa Inc has an average return of 10 percent and standard deviation of 19 percent. The average return and standard deviation of Lambda Products are 13 percent and 23 percent; and of Mu Enterprises are 12 percent and 26 percent.
a) Kappa, Lambda, Mu
b) Kappa, Mu, Lambda
c) Mu, Lambda, Kappa
d) Lambda, Mu, Kappa