If your company does not have an emergency plan, what should you do?

The best course of action when a company lacks an emergency plan involves a comprehensive approach to preparation and awareness. Planning for different kinds of emergencies and outlining steps to support those involved is crucial. This preparation helps ensure that everyone knows their roles, responsibilities, and the necessary actions to take in various situations.

Moreover, discussing the plan with a supervisor not only aids in refining the plan but also ensures that the plan aligns with company policies and resources. Collaboration with others might reveal potential gaps that need addressing, leading to a more robust emergency response strategy.

Considering all these aspects, a holistic approach that encompasses thinking about emergencies, actively planning for them, and collaborating with supervisors creates a thorough and effective emergency management plan. This method ensures that everyone is prepared and mitigates risks during emergencies, making option 'D' the most fitting choice.