Answer:Change in quantity demanded refers to change in the quantity purchased due to increase or decrease in the price of a product. ... On the other hand, change in demand refers to increase or decrease in demand of a product due to various determinants of demand, while keeping price at constant.
Explanation: hope this helps
1 Porfiriato 1876-1911
2 Madero 1911-1913
3.Huerta 1913-1914 and civil war
4. war of the winners- 1914-1915
5. Carranza- 1915-1920