B. Reminding his audience that freedom is important.Explanation:Martin Luther King's "I Have A Dream" was a public speech delivered during the March on Washington for Jobs and Freedom. In his speech, he reiterated the importance of freedom and why it is a must for blacks to get the same equality.In this speech, he uses repetition in using the phrase "Let Freedom Ring" towards the end of his speech. This repetition added to the power of the author's message by reminding the people of the importance of freedom.Thus, the correct answer is option B.
