A researcher spends two years studying a man suffering from anterograde amnesia, a condition that prevents the creation of new memories following a traumatic event. Which type of research method is the scientist using? A. Case Study
B. Experiment
C. Informal Observation
D. Naturalistic Observation
E. Survey

The answer is A. Case Study.

Explanation:

He's researching a specific case, in this case, a man with anterograde amnesia.

the answer to the question is punishment. or more specifically, positive punishment.

positive punishment occurs when a behavior is given a negative consequence for the individual doing the behavior.

sara no longer wants to ask questions (the behavior) because she is ridiculed by mr. smith (the punishment).

reinforcement is inaccurate because reinforcement always gives positive consequences for the individual doing the behavior, be it by introducing a pleasant consequence or removing an unpleasant one.