Opponents of the Death Penalty Argue All but Which One

Opponents of the death penalty argue all but which one of the following?

A) Innocent people are sometimes executed.
B) Capital punishment is racially biased.
C) Social science studies are inconclusive as to whether the death penalty deters criminal behavior.
D) It costs more to execute a criminal than to imprison someone for life.
E) Two wrongs do not make a right.