Which of the Following Statements Most Accurately Describes the Current

Which of the following statements most accurately describes the current state of thinking about the macroeconomy?

A) There are several theories focusing on different variables that help us understand the behavior of the macroeconomy.
B) Over time, economists have been unable to develop any theory that helps us understand the behavior of the macroeconomy.
C) There is almost complete agreement among economists that the classical model fully and accurately portrays the macroeconomy.
D) No theory of the macroeconomy is necessary because there are good theories that explain the behavior of businesses and households, whose actions drive the macroeconomy.