Which of these results in an increase in both price and quantity?A.A demand increaseB.A supply increaseC.A demand decreaseD.A supply decrease

The answer is A. A demand increase.

Here's why:

A. A demand increase: When demand for a product or service increases, consumers are willing to pay more, leading to a higher price. At the same time, producers are willing to supply more at the higher price, leading to an increase in quantity.

B. A supply increase: When supply increases, producers are willing to sell more of a product or service, but this typically results in a decrease in price because the product or service is more readily available.

C. A demand decrease: When demand decreases, consumers are not willing to pay as much, leading to a decrease in price. Producers also supply less because of the lower price, leading to a decrease in quantity.

D. A supply decrease: When supply decreases, there are fewer products or services available, which can lead to an increase in price. However, the quantity decreases because there is less of the product or service available.