MrsSmith, 80 Years Old, Has Been Vomiting and Having Bouts

Mrs.Smith, 80 years old, has been vomiting and having bouts of loose stools for several days.She is taking several medications that are prescribed.The nurse practitioner conducts a medication review because:

A) An accounting of all prescribed and over-the-counter (OTC) medications may uncover reasons for her symptoms.
B) There could be drug-drug interactions leading to her symptoms.
C) Side effects of the gastrointestinal tract are not seen in many medications.
D) The administration of some of her medications may be appropriate.