What is the purpose of one-way emergency communication systems?

The purpose of one-way emergency communication systems primarily revolves around the effective dissemination of critical information during emergencies. These systems are designed to broadcast emergency information to specific areas, whether indoors or outdoors, ensuring that individuals receive timely alerts regarding dangers, evacuations, or other urgent matters.

In the context of emergency management, the ability to transmit information clearly and swiftly is vital. One-way systems focus on delivering messages from a central point to a designated audience without expecting or requiring a response, which is essential in chaotic situations where rapid information-sharing can save lives.

This approach contrasts with two-way communication systems, which are primarily built for dialogues; therefore, they do not align with the intended purpose of one-way emergency systems. Similarly, general announcements or connecting multiple buildings for emergency responses serve different communication needs, and they lack the specificity and immediacy required in urgent situations that one-way emergency systems provide. This targeted functionality is what makes option B the correct choice.