Exports Are Treated as Autonomous Expenditure in Our Simple Macro

Exports are treated as autonomous expenditure in our simple macro model because

A) exports typically do not change as a result of a change in Canadian national income.
B) exports are always constant in dollar terms.
C) they are a component of net exports,which is autonomous in our model.
D) exports are a small component in the Canadian economy and are not significant in the model.
E) exports are a function of Canadian national income,which is autonomous in our model.