Which of the following is an example of a negative externality?
a. air pollution
b. an increase in sales
c. an increase in market size
d. the production of a substitute

The theory of vicarious liability or ostensible agency can expose a health plan to the risk thatit could be held liable for the acts of independent contractors. factors that may give rise to theassumption that an agency relationship exists between a health plan and its independentcontractors include