Which of the following examples below, which is not an example of scarcity?
select the correct answer below:
a. john has a test tomorrow that he must study for, but he also wants to go to a music concert tonight. he doesn't have time for both.
b. a puppy mill was shut down and all of the dogs went to an overcapacity humane society, leading to an increase in the supply of adoptable dogs.
c. each year only a limited amount of the flu vaccine is created.
d. hawaii's need for teachers is much higher than current quantity supplied because it is very expensive to live in hawaii and most individuals cannot afford to live in hawaii on a teacher's salary.