Which of the following are correct statements regarding macroeconomic equilibrium?

(A) Macroeconomic equilibrium occurs when aggregate demand equals aggregate supply.

(B) An increase in government spending shifts the aggregate demand curve to the right.

(C) At equilibrium, there is no unplanned inventory accumulation.

(D) A decrease in investment spending leads to an increase in output and employment.

(E) The economy can remain in equilibrium even if there is a high level of unemployment.

Choose the correct answer from the options given below: