​Which of the Following Statements Is True

Multiple Choice

​Which of the following statements is true?

A) ​The ATM model of money is a general­equilibrium model.
B) ​The opportunity cost of holding money in the ATM model increases when the nominal interest rate declines.
C) In a general-equilibrium model, most of the key macroeconomic variables are exogenous.
D) ​​Normally, results from a general equilibrium model can be applied to a wider range of problems than the results from a partial-equilibrium model.