What is the cultural diffusion in the united states

Cultural diffusion is the movement of a way of life. America is called The Melting Pot, because of all the cultural diffusion. America has many cultures such as Vietnamese, Indian, Italian, African, German, Mexican,Canadian and many more. There are restaurants and churches based on where you come from like Olive Garden is Italian, it is not specifically American. Also in New York City there is China Town for the Chinese and the culture of the Chinese spreads and more people get involved in the culture.

Explanation:

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;

what are the answer choices?