Answer:
Book 3
Explanation:
1,2 and 4 are all about specific cultures while 3 is about any culture.
ACA (a.k.a Obamacare)
was an act where people can afford health insurance without paying a high amount of money
Answer:
They're used to regulate economic activity over time.
Explanation:
They're used to accelerate the growth of the economy when it is in a depression, or slows down the economy when an economy starts to overheat per say.