What effect does Hemingway’s limited use of adjectives have?

What effect does Hemingway’s limited use of adjectives have?

a. It slows down the narration by interrupting the action.
b. It makes the few descriptive words he does use more vivid and forceful.
c. It makes the narrator seem powerless and insincere.
d. It prevents the readers from filling in the details with their own experiences.