What must be carried outside city limits when driving on divided highways at night?

When driving on divided highways at night, it is required to carry three red flares or three electric lanterns. This is essential for safety, as these items can be used to signal for help in the event of a breakdown or emergency. Their bright colors and reflective capabilities ensure visibility in low-light conditions, making it easier for other drivers to see any hazards on the road.

Carrying flares or lanterns is also crucial for preventing further accidents, as they alert approaching traffic to the presence of a disabled vehicle or an obstacle on the highway. This requirement reflects a focus on roadside safety measures to protect drivers and passengers.

The other options provided do not fulfill this essential safety guideline for nighttime operations on divided highways.