Which sentence in this body paragraph is most clearly the concluding sentence? (1) The first detail that predicts the main character's death in To Build a Fire' is his ego. (2) He is simply too full of himself to survive in the Alaskan wilderness. (3) For example, early in the story, he makes fun of the old man who warns him not to be outside when the temperature goes below a certain level. The main character ignores the old man and even thinks he's weak. (4) This shows that the main character has too little respect for his situation, which is one reason he is doomed.

A. Sentence 3
B. Sentence 4
C. Sentence 1
D. Sentence 2