Which of the following statements regarding the communication system in an area of refuge is MOST ...

Which of the following statements regarding the communication system in an area of refuge is MOST accurate?
 
  A) Areas of refuge are only required to have a communication system in high-rise buildings where rescue may be delayed.
  B) The interior area of refuge must contain adequate instructions on the use of the communication system.
  C) Codes require communication systems be designed to accommodate only persons with mobility disabilities.
  D) The communication system must be connected to the fire command center so instructions may be given to those awaiting rescue.