External benefits create a market failure because: A. The activities that produce external benefits may not create sufficient private benefits to producers and consumers to warrant their production. B. The activities that produce external benefits only improve the lives of poor people. C. The activities that produce external benefits are too costly to produce. D. External benefits do not improve the lives of individuals. E. The activities that create external benefits may create high external costs that harm communities.

C

Explanation:

A good has positive externality if the benefits to third parties not involved in production is greater than the cost. an example of an activity that generates positive externality is research and development. Due to the high cost of R & D, they are usually under-produced. Government can encourage the production of activities that generate positive externality by granting subsidies.

For example, the cost of producing a vaccine to cure a disease might be too high to be borne alone by the researcher. It is for this reason, government usually fund research programs done to develop vaccine

107x106 is the answer