Fewer People Get Flu Shots Than Is Efficient Because

Multiple Choice

Fewer people get flu shots than is efficient because:

A) people usually perceive that the private cost of getting flu shots is higher than their private benefit.
B) people usually perceive that the private benefit of getting flu shots is higher than their private cost.
C) the cost of producing flu shots is too high in relation to profits.
D) there are always more people getting flu shots than the amount of flu shots available.