Answer:
The correct option is "benefits for all individual citizens add up to at least $100,000".
Step-by-step explanation:
Marginal cost refers to the additional cost incurred in order to provide an additional unit of a commodity.
For a community, town, or country, benefit is maximized when the marginal cost of providing a good or service to the community, town, or country is equal to the sum of the marginal benefit for all individual citizens of the community, town, or country.
Based on the above explanation, the correct option is "benefits for all individual citizens add up to at least $100,000". That is, the town should provide the additional mosquito control only if the marginal benefits for all individual citizens add up to at least $100,000.