Answer:
B. He disagrees with Captain Jaggary's lack of sympathy
Explanation:
The only answer can be B because, A wouldn't make sense because, Captain Jaggary has to insist that Mr. Hollybrass throw over Cranick's body. As it says in the passage "Over!" He insisted." It cannot be C because, the look of appeal was at Captain Jaggary and he wasn't afraid of the dead body and he was already carrying the body but, he didn't want to throw it over. His "look of appeal" meant that he believed that Captain Jaggary was in fact not being just and therefore, cannot be D.
Therefore, your only answer choice would be:
B. He disagrees with Captain Jaggary's lack of sympathy
