<span>A literary genre in which slaves gave accounts of their lives in slavery, often including their time spent in slavery, escape, and heroism. </span>
I believe it's C.
We know that <span>a </span>clause<span> is the smallest grammatical unit that can express a complete proposition.
What do you think?</span>
He should focus on the main idea of what he is speaking about and have good details. He must have necessary words that will make the people better understand what he is talking about.