Which of the following government actions would lead to an increase in aggregate demand?(1

Which of the following government actions would lead to an increase in aggregate demand？

(1) Increasing taxation and keeping government expenditure the same

(2) Decreasing taxation and increasing government expenditure

(3) Decreasing money supply

(4) Decreasing interest rates

A.1 only

B.1 and 3

C.2 and 4 only

D.2, 3 and 4

请帮忙给出正确答案和分析，谢谢！