Which of the Following Assumptions About Deterrence Theory Is Questionable

Which of the following assumptions about deterrence theory is questionable or debatable, especially with regard to the death penalty?

A) that more severe penalties are more deterrent than less severe penalties
B) that potential offenders exercise rational judgment in deciding whether to kill
C) that potential offenders are predictably sensitive to the actual range of variation in certainty of legal punishment for murder at the time of the decision to act
D) that potential offenders are predictably sensitive to the actual range of variation in severity of legal punishment for murder at the time of the decision to act
E) all of the above