The patient prefers to take an herbal supplement rather than the prescription medication ordered by the physician. Which is the most appropriate response of the nurse?

"It is very convenient to take herbal supplements because they can be obtained without a prescription."

"Herbal supplements are significantly less expensive than prescription medications."

"Herbal supplements are not held to the same high-quality standards as prescription medications."

"Herbal supplements are made from plant materials so they are organic and nontoxic."