Because they were just now looking in the anatomy of the human body and the first vaccines were made
A. a country should use its military to establish an empire (apex)
The correct answer is "One Branch Congress", but later on we have concluded that the One Branch Congress gave too much power to the government and less than the people, hope this answer has helped you.
The concept of "normalcy" was based on nostalgia for an earlier America. The idea of nostalgia was new in Americans and since America was a new country, the forefathers wanted progress and did not want to look back in the past mentality.