A nurse administers medications to a group of older adults in a residential facility. Which of the following clients is most likely to experience adverse effects?
A. A 77-year-old man with a creatinine of 3.6
B. A 78-year-old man with a body mass index of 35
C. An 84-year-old woman with iron deficiency anemia
D. An 82-year-old woman with constipation