What phrase have some scholars devised to replace the term “melting pot” theory?

You could use "Ethnic Diversity" or just "Diverse"

Explanation:

A melting pot, if you're referring to America being full of different ethnic groups, you would say America is Diverse. (just an example)

the navigation act prevented the colonies from exporting to countries other than britain and it prevented the importation of goods by other countries as well. so i believe the correct answer is d. other nations could not deliver goods to the colonies.

hope this .