Why did congress move quickly to pass the bill of rights

Becahse during a debate on the Constitution many of the states had insisted that the Bill of Rights be added and then became one of the first task of the new Congress they also moved quickly because the bill of rights aims to protect people against abuses by the federal government and they wanted Americans to know that

Because southern states would not agree to the Constitution unless their individual rights are protected

high entry costs prevent new producers from entering the market.

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.