Assessing the Postoperative Client's Level of Consciousness Is a Priority

Assessing the postoperative client's level of consciousness is a priority because a change in the level of consciousness may be the first indication that which of these complications has occurred?

A) a stroke or increased intracranial pressure
B) an adverse reaction to anesthetic agents or postoperative medications
C) fluid and electrolyte imbalances or hypoxia
D) sleep deprivation or sensory input overload