Read the sentence.

english colonists often exchanged goods and knowledge with native americans.

which words in the sentence are nouns?

colonists, often, knowledge, native americans

colonists, goods, knowledge, native americans

english, colonists, exchanged, goods

english, often, exchanged, knowledge

The correct anwer is option B) "colonists, goods, knowledge, Native Americans".

The words colonists, goods and knowledge are common nouns, and Native Americans is a proper noun.

Option A) is incorrect since the word "often" is not a noun but an adverb.

Option C) is also incorrect since the word "English" in this sentence is used as an adjective, and the word "exchanged" is the verb of the sentence.

And finally, option D) is also incorrect since English is used as an adjective, often is ans adverb, and exchanged is a verb.