The correct answer is this one: "may recover slowly after they experience a significant decline in aggregate demand." According to Keynes, market economies may recover slowly after they experience a significant decline in aggregate demand. Aggregate demand or the domestic final demand<span> (DFD) is the total </span>demand<span> for final goods and services in an economy at a given time.</span>
Although Prince Henry rarely participated in explorations, he sent many expeditions from Portugal to the west coast of Africa, and was responsible for Portugal's influence in the Great Age of Exploration. Because of Prince Henry, Portuguese explorers were the first to sail to Africa's Gambia River.