Why did Benjamin Franklin regret buying the whistle

The description of the house in this excerpt gives an example of

Which generalization does the speaker make in the last stanza of to a louse? a) our main source of power comes from living blunder-free lives b) sometimes the best gifts come in the form of little creatures c) seeing ourselves as others see us would free us from blundering

The knights of the round table were bound by the code of chivalry that called for loyalty to king, god, and lady.  in which set of lines from  sir gawain and the green knight  does sir gawain describe upholding this code?