Which of the Following Contributes to the Controversy Surround Lethal

Which of the following contributes to the controversy surround lethal injections for the death penalty?

A) without an EEG recording during the process, it is impossible to verify that anesthesia is full effective during the entire process
B) some state governments are starting to create their own "secret cocktail" of lethal injection that has not been verified as humane
C) use of the pancuronium fully paralyzes the inmate and prevents them from communicating pain
D) it is possible that the cause of death via suffocation could proceed severe cardiac arrest
E) all of the above