Hello, I have an agriculture economics-related question about commodity futures and can not seem to figure out the answer? Here is the picture of the image below.

D Question 17 If a regression model for the futures price of wheat is constructed: O All of the factors that affect wheat futures can be explained mathematically. O The model will be of little use in trading wheat because there are too many variables to be explained. O Wheat traders will have a fool proof guide for trading wheat. O The equation will include most of the factors that affect wheat price plus a random variable