A positive externality a. results in an optimal level of output. b. is a benefit to the producer of the good. c. is a benefit to someone other than the producer and consumer of the good. d. is a benefit to the consumer of the good.

c. is a benefit to someone other than the producer and consumer of the good.

Explanation:

In the production process an externality is the effect of the activities not the business on the society. This can be positive or negative.

A positive externality is one in which the consumption not a produced good results in benefit to a third party other than the producer or consumer.

For example if car buyers decide to walk more often than drive it will reduce pollution in the society. This is a positive benefit to the society at large.

Or when an apple farmer plants his trees it provides nectar to the beekeeper.

b

explanation:

answer(b) partnership';