Final answer:
If there's no SOD commander for an event, the highest-ranking officer takes command.
Step-by-step explanation:
In event where there is no SOD (Supervisor on Duty) commander, the highest-ranking officer will usually take command. This is because the highest-ranking officer is typically the most experienced and knowledgeable in the situation. They will step in and assume the responsibilities of the commander in order to ensure that the event proceeds smoothly and efficiently. For example, if there is no SOD commander for a military operation, the highest-ranking officer present will take charge and make decisions regarding strategy, deployment, and overall management of the operation. Therefore, the correct answer to the question is B) The highest-ranking officer takes command.