<span>damage the good reputation of (someone); slander or libel.</span>
Answer:
"he had to talk so properly that speech was become insipid in his mouth"
Explanation:
This is the only detail/option that states how being "civilized" is not all it's cracked up to be. The definition of "insipid" is "lacking flavor." If Huck Finn is made to speak properly, he loses his boyish, informal manner of speaking. This detail supports the theory that becoming a proper young man is stifling, confining, and intolerable.
The phrase/idiom, truly see something, means to to be well informed of "it's existence either as empty or void."
Hope this answered your question ._.
Answer: In my history book it states “Historians have traditionally regarded the series of seven debates between Stephen A. Douglas and Abraham Lincoln during the 1858 Illinois state election campaign as among the most significant statements in American political history.” which is also stated on google search. Credit to my history book and google search.