The flag of the united states, which is often called the stars and stripes, originated during the revolutionary war. which statement about the underlined sentence phrase is true? a. the phrase is connected to the sentence with a relative adverb. b. the phrase is a relative pronoun. c. the phrase is a nonessential adjective clause. d. the phrase is an essential adjective clause.

Hiya!

This question isnt fun at all...

but I have information that should actually help if you take the time to read them and compare it to the question's sentence. It'll help you understand hopefully,

A relative adverbs are, "where, when, & why" whereas relative pronouns contain the following, "who, which, whose, whom, that"

An Adjective clause gives more information about a noun or prounoun.

Essential Adjective is needed to make the sentence proper and understanable.

Nonessential Adjectives clauses are set apart with commas, making it nonessential.

Hope this helps!