Answer:
here are three basic categories for fire alarm panel signals: trouble, supervisory, and alarm. Trouble Signal. A trouble signal is typically designated by a yellow light and means that there is an operational issue. For some more advanced systems, the panel may indicate the kind of problem and where it is located.
Explanation:
Straight
Curvilinear
Rectilinear
Liam a would need to contact the software developer. So the answer is B
