<span>It was the first step to connecting the western and eastern hemispheres together through trade and culture exchange. Although European diseases wiped out many native cultures, other exchanges such as corn and potatoes allowed a better diet for people and increased native and Irish population.</span>
A shift in aggregate demand can cause an economic expansion and over time the effect on the expected price level is rising and shifting aggregate supply to the left. Hence, the correct option is (D).
<h3>What is Aggregate Demand?</h3>
Aggregate demand is a measurement of the demand that occurs for a product or service in a nation. The measure used in aggregate demand is money. Therefore, aggregate demand will show the amount of money spent by consumers on a good or service at a certain price level. Aggregate demand measured over a long period of time will also reflect gross domestic product (GDP).
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