A 4-year old male intact Jack Russell is recovering post-operatively after a lung lobectomy following a coyote attack. The dog is very painful. Which of the following combinations of medications may be given as a constant rate infusion and is commonly used for pain control in the critical care setting?

A)Morphine, lidocaine, ketamine

B)Diazepam, ketamine, morphine

C)Medetomidine, acepromazine, lidocaine

D) Propofol, morphine, bupivacaine