Final answer:
The highest-ranking officer must accept command as a P.O.W., regardless of their service branch. In the broader context of power, sovereignty represents the pinnacle of political power, senators are seen as power elites by sociologists like C. Wright Mills, and a camp director for ill children is an example of an expressive leader.
Step-by-step explanation:
Within the context of a Prisoner of War (P.O.W.) scenario, the correct answer to who must assume command regardless of service is a) The highest-ranking officer. This follows the protocol outlined in various military codes of conduct which state that the senior most member present by rank is responsible for making decisions and leading others, even across different service branches. It is a means to maintain order and a chain of command even in captivity.
In reference to other questions, the highest form of political power is often considered to be c) The sovereign, depending on the context of the government system. According to C. Wright Mills, a b) senator is more likely to be a member of the power elite. Lastly, the person more likely to be an expressive leader might be c) The director of a summer camp for chronically ill children, as this role typically requires great empathy and the ability to nurture, inspire, and manage the emotional climate of the team or group.