When Providing an Alarm System for an Operating Suite to Use

When providing an alarm system for an operating suite to use in case of emergency, which of the following are important design factors?

A) All surgical personnel should know how to activate the alarm and what to do when it is turned on.
B) The alarm should clearly notify personnel of an emergency by flashing lights and emitting a loud noise within the surgical suite.
C) The alarm should notify personnel who are outside of the operating room, such as those at the nurse's station nearby.
D) Both A and C