Using the aggregate demand and aggregate supply model, a decrease of what curve is by itself consistent with the changes in prices and output that occurred during the onset of the great depression?

The correct answer is aggregate demand.

Explanation:

On the onset of the great depression, the stock market crash led to a reduction in consumer confidence. As a result, the investment in capital market declined. This caused the aggregate demand curve to shift to the left. This further caused nominal wages to increase. As a result, the aggregate supply increased.  

The reduction in wealth affected the consumer confidence adversely causing a further reduction in consumption and thus decline in aggregate demand. When the government revenue declined due to a fall in income and consumption, the governments increased tax rates to compensate. Higher taxes further led to a fall in disposable income causing consumption and aggregate demand to decline.

The rightward shift in the aggregate supply curve because of a fall in nominal wages failed to increase real GDP because of continuous reduction in aggregate demand.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.