Drills should familiarize occupants with:

The correct choice emphasizes the importance of familiarizing occupants with all available exit routes during drills. This comprehensive approach ensures that in the event of an emergency, individuals are well-informed about multiple pathways to safety, not just the main exits or specific methods like fire extinguisher use. Understanding various exit options enhances the likelihood of a safe and efficient evacuation, especially in scenarios where certain exits may be compromised.

The other choices are more limiting, focusing either exclusively on elevator use, main exits only, or the use of fire extinguishers. While these elements are important, they do not provide the broad knowledge necessary for effective decision-making during an emergency, thereby potentially hindering the overall safety and preparedness of the occupants. It’s crucial for everyone to know all available routes to adapt quickly to changing situations, making the correct answer vital for comprehensive emergency preparedness.