In the call of the wild, hal, charles, and mercedes are poor mushers because they fail to gain knowledge from their mistakes. this is connected to the theme of learning from

Experience

Explanation:

In the book "The Call of the Wild," Hal, Charles and Mercedes are awful at their tasks. They seem to be unable to survive in the wild, and they are terribly unprepared for dealing with nature. Moreover, they also seem unable to learn from experience or from their mistakes. Instead, they are unreasonable, spoiled, and impatient. After a series of mistakes become evident, instead of trying to solve them, the three only fight even more intensely.

c. a group of tribes that formed a confederacy