Why might economic planning by the government be permitted in a market economy during national emergencies or times of war? To increase consumption to stabilize prices to increase demand to mobilize resources

The correct answer is to mobilize resources.

The United States, which is a market economy, had the government get involved in the economy during World War I and World War II. The federal government did this to ensure that the American military had the necessary weapons, ammunition, and other resources in order to be successful in the wars. This resulted in businesses, like the automotive industry and steel industry, to change the product in which they would produce during this era.