A nurse working in radiology administers iodine to a patient who is having a computed tomography (CT) scan.The nurse working on the oncology unit administers chemotherapy to a patient who has cancer.At the public health department, a nurse administers a measles mumps rubella vaccine to a 14-month-old child as a routine immunization.Which branch of pharmacology best describes the actions of the three nurses?

Choice A rationalePharmacodynamics is the study of how drugs affect the body, including the mechanisms of action and the relationship between drug concentration and effect. It does not describe the actions of the nurses in this context.Choice B rationalePharmacotherapeutics involves the use of drugs to diagnose, treat, and prevent disease. The actions of the nurses in administering iodine, chemotherapy, and vaccines are examples of pharmacotherapeutics, as they are using drugs for therapeutic purposes.Choice C rationalePharmacoeconomics is the study of the cost and value of drugs and therapies. It does not describe the actions of the nurses in administering medications.Choice D rationalePharmacokinetics is the study of how the body absorbs, distributes, metabolizes, and excretes drugs. It does not describe the actions of the nurses in this context.