Suppose that a store’s management is considering a plan in which customers who donate blood get a $20 gift card. If both store REVENUES and blood donations (i.e., number of pints donated) rise with this plan, which of the following is true? Be sure to explain your reasoning.
A. The demand for blood is price elastic.
B. The demand for blood is price inelastic.
C. The demand for the store’s products is price inelastic.
D. The demand for the store’s products is price elastic.