State whether the following will result in a change in demand or a change in quantity demanded. Explain.
a-The price of Burger King hamburgers decline
b- Mc Donald’s distributes coupons for $1.00 off the price of its hamburgers
c- Because of a shortage of potatoes, the price of French fries increases
d- Fast food restaurants post nutrition labels on their menu.
e- The US economy enters a period with rapid growth in income