Final answer:
Subtitles should be used in a recreation of a true hostage situation for a documentary to ensure all viewers can access the dialogues and facts presented.
Step-by-step explanation:
It would be advisable to use subtitles in a video in a scenario where viewers might not understand the spoken language or when there is important dialogue or information that could easily be missed. Looking at the options provided, the most appropriate scenario for using subtitles is:
- Option C: in a recreation of a true hostage situation for a documentary.
This is because in a documentary, especially one that recreates true events like a hostage situation, it is crucial to clearly communicate the events, dialogues, and facts to the audience. Subtitling in this scenario ensures that all viewers, regardless of hearing ability or language proficiency, have access to the information being presented.