Final answer:
Milo would most likely identify his classmates by their voice when taking notes.The correct option is D.
Step-by-step explanation:
Milo would most likely identify his classmates by their voice when taking notes. Each classmate would have a unique voice that Milo could recognize. It would be difficult to identify classmates based on their handwriting, as notes are typically written quickly and may not accurately represent individual handwriting styles. Drawings and smells are unlikely to be effective ways of identifying classmates.