When treating an 80-year-old patient who is in shock, it is important to remember that:
A) the older patient's central nervous system usually reacts more briskly to compensate for shock.
B) medications older patients take for hypertension often cause an unusually fast heart rate.
C) compensation from the respiratory system usually manifests with increased tidal volume.
D) changes in gastric motility may delay gastric emptying, which increases the risk for vomiting.