Final answer:
C.positive punishment. The type of operant conditioning occurring in the scenario is positive punishment.
Step-by-step explanation:
The type of operant conditioning that is occurring in the scenario is positive punishment (option C). Positive punishment refers to adding an undesirable stimulus to decrease a behavior. In this case, Molly swats her dog on the nose to discourage it from chewing her slippers again. The swat on the nose serves as a punishment, which decreases the likelihood of the dog chewing on the slippers in the future.