Final answer:
The two key elements of the Incident Action Plan are the command structure and incident objectives, which organize response efforts and establish response goals and priorities.
Step-by-step explanation:
The two major components of the Incident Action Plan (IAP) are c) Command structure and incident objectives. The Incident Command System (ICS) uses the IAP to manage emergency responses. The command structure outlines the organization of the incident management and response teams, including the assignment of responsibilities and the flow of information. Incident objectives establish the goals and priorities of the response effort, including considerations for life safety, incident stabilization, and property preservation.