Which of the Following Best Defines the Classical Dichotomy

Multiple Choice

Which of the following best defines the classical dichotomy?

A) It is the separation of variables that move with the business cycle and variables that do not.
B) It is the separation of changes in money and changes in government expenditures.
C) It is the separation of endogenous and exogenous variables.
D) It is the separation of real and nominal variables.