Answer:
Option a (unintended side-effects) is the right alternative.
Step-by-step explanation:
- A cost, as well as benefit occasioned by such a production company that would not be economically accumulated rather than started receiving by this same producer, seems to be an environmental problem.
- An externality could be either favorable or unfavorable and therefore can occur whether from the development or use of a particular product. The expenses and rewards may be confidential to a person or an organization, or social, which means that society as a whole should be influenced.
Some other options are given aren't connected to the conclusions reached. So, the obvious response here is just the right one.