The answer is B: negative punishment.
Explanation for each option:
A. Positive punishment: This involves adding an unpleasant stimulus to decrease a behavior. For example, scolding a child for misbehavior. In Jenna's case, nothing is being added; instead, something enjoyable is being removed.
B. Negative punishment: This involves removing a pleasant stimulus to decrease a behavior. Jenna's parents are using time-out to remove her from enjoyable activities, which fits the definition of negative punishment.
C. Child abuse: This is a serious and harmful action that causes physical or emotional harm to a child. The scenario described does not indicate any form of abuse; it is a disciplinary technique.
D. Negative reinforcement: This involves removing an unpleasant stimulus to increase a behavior. For example, stopping a loud noise when a desired behavior occurs. Jenna's situation does not involve increasing a behavior by removing an unpleasant stimulus.
Therefore, the correct answer is negative punishment, as Jenna's parents are removing her from enjoyable activities to decrease her poor behavior.