Final answer:
The two lights at the top of the class indicate Emergency Lockdown, which means that students should stay inside the classroom. Correct option is c.
Step-by-step explanation:
The two lights at the top of the class indicate Emergency Lockdown, which means that students should stay inside the classroom. This is typically used when there is a potential threat or danger inside or near the school building.
Emergency lockdowns are implemented to ensure the safety of students and staff in situations such as an active shooter, a dangerous individual on the premises, or any other potential threat. It is important to follow the instructions given by teachers and school officials during an emergency lockdown to stay safe.