How does the "auger hole, bored about half an inch or so, into the plank" develop the symbol of Ahab's whalebone leg?

It reveals Ahab's extreme boredom with being on deck all the time.

It reveals Ahab's special connection to Moby D*ck.

It reveals Ahab's commitment to his mission for revenge.

It reveals the destructive power of ivory on natural wood.

Answer: It reveals Ahab's commitment to his mission for revenge.

In this passage, the speaker is describing the impact that Ahab caused when meeting him for the first time. He describes his white, whalebone leg, and how he fashioned it out of a sperm whale's jaw. He also describes how there was an auger hole on the deck, upon which Ahab would steady his leg. He would stand there and look out beyond the prow for hours on end. The speaker also describes his attitude of determination and wilfullness. All of these elements contribute to showing how commited Ahab was to his mission.

C is right.