Answer:
The best answer would be D. Context clues
Explanation:
Context clues are hints that an author gives to help define a difficult or unusual word within a book. The clue may appear within the same sentence as the word to which it refers or it may follow in the next sentence.
Here are some Context Clues examples:
Synonym or Restatement
Antonym or Contrast
Definition or Explanation
General or Inference
Punctuation or Font
Tone or Mood