I believe D OR C but I think it’s C
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.
Answer: (B) The Roman Empire's legal system is a major influence on modern European Court Systems.
I just did this question and I got it right
Answer:
B) the separation between the Orthodox Churches in the East and the Roman Catholic Church in the West