A nurse is caring for a client with type 2 diabetes.Which of the following medications is used to treat elevated blood sugar levels?

Choice A rationaleMetoprolol is a beta-blocker used for hypertension and angina, not for controlling blood sugar levels.Choice B rationaleGlucagon is used to treat severe hypoglycemia by increasing blood glucose levels, not for regular blood sugar control.Choice C rationaleMetformin is an oral hypoglycemic agent used to lower elevated blood glucose levels in type 2 diabetes.Choice D rationaleNitroglycerin is a nitrate used to treat angina by dilating blood vessels, not for blood sugar control.