B. F. Skinner is a figure that popularized a term known in the Behaviorism school of thought as operant conditioning. Operant conditioning is a process of learning where desirable behaviors exhibited by organism would be strengthened if reinforcement is given, and undesirable ones can be eliminated by giving punishments.
Based on this definition, Skinner would most likely endorse the view in option (C) rewarding children for imitating language supports language development.