0. Overlearning tends to strengthen an individuals:
Overlearning involves continued practice even after material is mastered, helping to solidify memory and improve long-term retention.
Option A: powers of retention
Correct; improves memory and recall.
Option B: endurance
Incorrect; not directly related to stamina.
Option C: feeling of boredom
Incorrect; can occur, but not a benefit of overlearning.
Option D: motivation
Incorrect; motivation may decrease if overlearning is excessive.