Answer:
C.
Step-by-step explanation:
Foreshadowing refers to a literary device in which an author gives the reader a hint of what is going to happen later in the story. This allows the author to build suspense by raising the reader's expectations. In this case, the author tells us that the blisters are signs of what is going to happen later on in the hike. The reader can conclude that the hike will most likely prove difficult for Max.