Read the paragraph. (1) Dr. Martin Luther King Jr. uses repetition to give his speech rhythm and momentum. (2) "Let freedom ring” is a phrase which is used many times in his speech. (3) "Let freedom ring” is a phrase that leads to an exciting conclusion.

Which revision combines sentence 2 and sentence 3 most effectively?

Many times the phrase “Let freedom ring” is used in his speech because it is an exciting conclusion.
Many times the phrase “Let freedom ring” is used to lead to an exciting conclusion.
“Let freedom ring” is a phrase, and it is used to lead to an exciting conclusion many times.
“Let freedom ring” is a phrase that is used many times to lead to an exciting conclusion.