What Is the Definition of a Sentinel Event in Terms

What is the definition of a sentinel event in terms of patient safety?

A) A sentinel event is an unexpected patient safety medical error that involves physical injury, or death, as well as near misses.
B) A sentinel event is an unexpected patient safety medical error that involves physical and psychological injury, or death, as well as near misses.
C) A sentinel event is an unexpected patient safety medical error that involves physical and psychological injury, or death, not including near misses.
D) A sentinel event is an unexpected patient safety medical error that involves physical injury, or death, not including near misses.