There are elements of truth in each of the options, but C is the only correct answer.
While Ben Gunn hints to Jim that he has already found the treasure, claiming that he's rich, Jim doesn't catch on to this at the time. Because Jim left the stockade to recover and beach the Hispaniola, he wasn't present to learn Dr. Livesey negotiated with Ben Gunn to relocate the stockade group to Gunn's cave, where...
The most accurate answer would be C. <span>Dr. Livesey brings the two sides together and negotiates a peace, but neither side gets any treasure. </span>
The subordinate clause here is 'until you finish your homework' and it is an 'adverb clause'. It is introduced by a subordinating conjunction, 'until'.
