Opponents of the death penalty for certain violent crimes might use social psychological data to argue that one reason why the threat of capital punishment doesn't serve as an effective deterrent to violence is that

A) the vast majority of violent crimes are crimes of passion.
B) criminals do not care about punishment.
C) the threat of death by lethal injection is not severe enough to deter violent criminals.
D) the odds are low that a violent criminal will be swiftly apprehended, tried, and convicted.
E) many capital cases are plea-bargained to save money.

D) the odds are low that a violent criminal will be swiftly apprehended, tried, and convicted.