Which of the Following Ideas Is a Criticism Against Skinner's

Which of the following ideas is a criticism against Skinner's theory?

A) In general,punishing inappropriate behavior is a more effective way to modify behavior than rewarding appropriate behavior.
B) A person who wants something and has reasons to be optimistic is not always motivated.
C) How much people are willing to contribute to an organization does not always depend on their assessment of the fairness,or equity,of the rewards they will receive in exchange.
D) Punishing unacceptable behavior may provide quick results but may lead to increased turnover.
E) The concept of behavior modification fails to explain the existence of company politics.