Answer:
fingers . . . his body
Step-by-step explanation:
According to the excerpt from PART 2 of To Build a Fire, it is narrated that a man in very cold weather had been walking which helped pump blood to the surface of his body but as soon as he stopped to build a fire and removed his mittens, his fingers had quickly gone numb.
The words from the excerpt that provide context clues for the underlined word is option D.