I think it would be single parent familys beause most of the people are single parents
Answer: C
Explanation: I would say that it's a significant role for government in the running of the economy.
I believe the answer is: positive externality
Positive externality refers to The benefit that enjoyed by a third party when the first and second party are conducting a transaction.
When you receive a vaccines, you prevent yourself from becoming a host that could contaminate other people from getting the virus. In the example above, you and your children are the first and second party. And other children are the third party.
