4. Would the impact of Dr. King’s words have changed if he had chosen to write in an informal style? Support your answer with textual evidence

Reminder: Formal writing is polite and professional- the way you would write to your boss or teacher. Informal writing is casual and relaxed- the way you would communicate with your friends.

I'm not sure exactly where I can find that in the text. I have read it over and over and am having a really hard time with this question.

Thanks in advance for any help!