To offer an opinion or theory about the meaning of the work
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The answer to the question is letter "B. informal". This is the level of diction which is conversational. This includes documents, personal letters, emails, and others that are aimed to converse and entertain. Further, this also sometimes includes "slang" language.
The word I would use is Inevitable.
It’s not Suppose to be at hall it’s suppose to be at 4