Question

strengthening of a response through the introduction of a stimulus after the response occurs
avoidance learning
positive reinforcement
insight learning
secondary reinforcer
programmed instruction

Explanation:

Positive reinforcement involves presenting a stimulus after a response to strengthen that response. Avoidance learning is about learning to avoid a negative stimulus. Insight learning is sudden understanding. A secondary reinforcer is a learned reinforcer. Programmed instruction is a teaching method.

Answer:

B. positive reinforcement