Private Market Incentives Will Tend to ____ Provide Immunization Against

Private market incentives will tend to ____ provide immunization against contagious disease because

A) efficiently;price will serve as a signal of marginal benefit and marginal cost.
B) over;external costs will not be taken into account by decision makers.
C) under;external benefits will not be taken into account by decision makers.
D) inequitably;health care services should not be provided based on ability to pay.