Identify each of the following as (1) a change in demand or (2) a change in the

Question:

Identify each of the following as (1) a change in demand or (2) a change in the quantity demanded.
a. Grape consumption falls because of a consumer boycott.
b. Grape consumption falls because of a tax on grape producers.
c. Grape consumption rises because of a good harvest.
d. Grape consumption rises because of a change in tastes.