Suppose There Is a Theory That Several Things Influence the Price

Multiple Choice

Suppose there is a theory that several things influence the price of fish in Halifax,one of which is the weather during the fishing season.When examining the determinants of the price of fish,the weather is

A) an endogenous variable,as it influences the price of fish.
B) an exogenous variable,as it is determined outside the theory.
C) a stock,as it influences the quantity of fish caught.
D) an act of God and,therefore,has no legitimate connection with the theory.
E) an endogenous variable,as it is determined within the theory.