C). He is overconfident about his ability to hike in the wilderness alone, which leads him to a senses of mistakes that become fatal for him.
Explanation:
Jack London's 'To Build A Fire' relates the story of young boy(miner) who visits Yukon in search of gold but gradually we witness his/her overconfidence affects 'the decisions'.
As per the question, the statement that reflects the manner in which the man's personality affects the decisions is displayed through option C'he is overconfident about his ability to hike in the wilderness alone, which leads him to a senses of mistakes that become fatal for him'. His excessive 'self-assurance' proves lethal for him. Thus, <u>option C</u> is the correct answer.
