21. Which work did Twain use as his main source for the numerous tedious tales of knightly deeds in the book, sometimes quoting whole chunks verbatim?
From Quiz A Connecticut Yankee In King Arthur's Court
Answer:
Malory's "Morte D'Arthur"
Twain was doing two things here. Firstly, he was attacking all romanticised tales of chivalry and medieval history for the effect they could have on people who believed them to be real. Twain hated this genre of literature intensely and particularly had it in for Sir Walter Scott, who he attacked several times in his work "Life on the Mississippi" for the debilitating effect he had on the American South:
"Then comes Sir Walter Scott with his enchantments, and by his single might checks this wave of progress, and even turns it back; sets the world in love with dreams and phantoms; [...] with decayed and degraded systems of government; with the sillinesses and emptiness [...] He did measureless harm; more real and lasting harm, perhaps, than any other individual that ever wrote."
Quite. The other answer choices also use tales of chivalry for satirical purposes or to make a political point. Malory was apparently serious.
Secondly, Twain was obsessed with contrasting the grand high-faluting language of these tales with the very earthy and/or crude language he claimed people - even great kings and nobles - used in real life. His ultimate example of this is his very, very rude piece "1601: Conversation as it was by the Social Fireside, in the Time of the Tudors", so controversial that he originally had it published anonymously. In "Connecticut Yankee", though, he uses Hank to have yet another go at poor Scott:
"Suppose Sir Walter, instead of putting the conversations into the mouths of his characters, had allowed the characters to speak for themselves? We should have had talk from Rebecca and Ivanhoe and the soft lady Rowena which would embarrass a tramp in our day."