The return to "normalcy" during the 1920s can best be described as an attempt to
a. expand social welfare programs.
b. show greater tolerance toward immigrant groups.
c. reduce the role of government in regulating the economy.
d. increase united states intervention in european political affairs.

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.