Answer:
B. Search for a gold mine.
Explanation:
In Jack London's "The Call of the Wild", the protagonist is a domestic dog Buck who changed masters over the course of the story. He met with Thornton and became attached to him till his death at the hands of the Yeehats.
Busk had been saved from his torturous masters by Thornton on one of their journeys. Thornton notices that the sled dogs were poorly treated and also told the owners Mercedes, Charles and Hal not to continue with their plan to cross the river. But they did not heed to this advice from an experienced outdoors-man. Thornton noticed that Buck was a remarkable dog who was mistreated by his masters so he hit Hal and released the dogs, taking Buck with him. Ever since then, Buck had stayed with him till the murder of Thornton by the Yeehats. Thornton was a gold hunter, and took Buck along on his expeditions in search of a gold. He also went along with Thornton and his partners in search of a gold mine.
