Here are the best choices for each sentence:
Question 13: The monks lived a(n) ascetic life, practicing self-denial and strict discipline.
Question 14: Nat Turner became a(n) fanatic for the cause of freedom and led an uprising of slaves.
Question 15: The wily con man deceived the elderly widow with an elaborate ruse.
Question 16: The remorse he felt for his part in the crime continued to gnaw at him until he confessed.