Answer:
B and D
Explanation:
Iron pillow and fertile silt are not farming advances.
The creation of the Federalist Party, that favored business, a strong government and a lax interpretation of the Constitution, and the Democratic-Republican Party, that wanted a society based on small farms and a weaker core government; changed the nature of politics in the US as they proposed a dichotomy when voting, since the Constitution had been silent about political parties.
Although opportunity cost is definitely important, it is hard to put a "price" on the opportunity in many cases, which makes it unmeasurable. This is why economists focus almost exclusively on price.
She was fascinated by it,hence the name the (Renaissance)