There Are Three Stocks: A, B, and C You Can

There are three stocks: A, B, and C You can either invest in these stocks or short sell them. There are three possible states of nature for economic growth in the upcoming year (each equally likely to occur) ; economic growth may be strong, moderate, or weak. The returns for the upcoming year on stocks A, B, and C for each of these states of nature are given below:

A) 17.0%
B) 22.5%
C) 30.0%
D) 30.5%