is a theory that when various peoples and ethnic groups come the United States they retain their former cultural identities, become U. S. citizens but adding new aspects of what it means to be "American."

The melting pot theory.

Explanation:

This conception looks at the United States as a place where all the immigrants from the outside world come and become Americans, they assimilate American values and norms, and make their children assimilate them, despite retaining much of their original cultural identities. In this process, they make contributions to the American social fabric.

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d