Final answer:
The correct answer is option A: EOP covers all aspects of emergency management, unlike other plans which may focus on a single mission area.
Step-by-step explanation:
The question asks about the difference between an Emergency Operations Plan (EOP) and other types of plans within the context of emergency management. Option A accurately describes the difference by stating that the EOP covers all aspects of emergency prevention, preparedness, response, and mitigation, while other types of plans generally focus on one mission area. In contrast, options B, C, and D contain inaccuracies; B is incorrect as EOPs must align with the National Incident Management System (NIMS), C is wrong because EOPs are not exclusively focused on response, and D is inaccurate because EOPs utilize an all-hazards approach, not focusing on one specific hazard type.