Why was Gulliver's master so eager to teach him the language of the Houyhnhnms?

A) He wanted Gulliver to be able to teach him to speak English.
B) He wanted to train Gulliver to perform menial tasks.
C) He wanted to learn about Gulliver, and to understand him.
D) He wanted to learn where Gulliver came from because he wanted to send an army there to conquer the people.