Answer:
C. The boatswain asks what Sebastion is doing on the deck.
Answer:
I'd say the word that best describes the meaning of curmudgeonly would be yelled. A good synonym for curmudgeonly would be grouch or irritable.
Explanation: The word curmudgeonly means bad-tempered and negative, so I would assume that him yelling at the children is why the word curmudgeonly is used to describe him.