The nurse is explaining the differences between uncontrolled and controlled substances.Which of the following medications is a controlled substance?

Choice A rationaleLisinopril is an antihypertensive medication and is not classified as a controlled substance.Choice B rationaleNaloxone (Narcan) is an opioid antagonist used to reverse opioid overdoses and is not a controlled substance.Choice C rationaleTetracycline is an antibiotic and not classified as a controlled substance.Choice D rationaleMorphine is an opioid analgesic used for pain management and is classified as a controlled substance due to its potential for abuse and dependence.