Which quotation from The Phantom Tollbooth contains the best example of a pun?

A"I'm the Whether Man, not the Weather Man, for after all it's more important to know whether there will be weather than what the weather will be."
B"I don't know of any wrong road to Dictionopolis, so if this road goes to Dictionopolis at all it must be the right road."
C"Good question, good question," he exclaimed. "Expectations is the place you must always go to before you get to where you're going."
D"In the Doldrums, laughter is frowned upon and smiling is permitted only on alternate Thursdays."