A nurse is providing care for an elderly client whose analgesia has been ordered by the IV route. ...

A nurse is providing care for an elderly client whose analgesia has been ordered by the IV route. While reviewing the client's medication administration record, the nurse observes that the dosage range differs from that of most young adult clients.
 
  What is the most likely rationale for this difference? A) Older adults are often more susceptible to toxic drug effects than younger adults
  B) Older adults typically require higher doses than younger adults to achieve a therapeutic effect
  C) Older adults tend to absorb drugs into their adipose tissue, requiring lower doses
  D) Older adults benefit from more frequent administration of lower doses of drugs