Answer: decrease and AD will shift leftward
Explanation: AD is short for aggregate demand which is the total demand for final goods and services in an economy at a given time. The aggregate demand curve tends to shift to the left when total consumer spending reduces. Spending less may be due to various reasons such as, rising cost of living, increase in government taxes or decide to spend less and save more if they expect prices to rise in the future.
The reason for decrease in net exports and a leftward AD curve is because the US does a lot of business with Asia and a slump in their economy will affect the United States negatively as well.
