That would be choice C. the index fossils.
I hope this helps you! :)
Answer:
The answer is C
Explanation:
I just read this, everything you need to know is in here :)
https://millercenter.org/president/jefferson/impact-and-legacy
Spillover costs are Productions costs paid by the general public.
Spillover costs are also known as negative externalities. These are costs or dates shouldered by third parties due to a market transaction.