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The impact of this speech on Dr. King's audience might have been was to tell them it was a decisive moment to claim back their freedom because after 100 years later they still haven't redeemed their freedom.

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The most effective rhetorical choice king appeals to is pathos by bringing out the audience  desire to become an equal part to fight for freedom.  t supports our claim by using pathos to evoke  their patriotic emotions.

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King's message is to get justice from all the inequality that there has been in their present. For example, "Some of you have come from areas where your quest for freedom left you battered by the storms of persecution and staggered by the winds of police brutality. You have the veterans of the creative suffering."