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Modal verbs express degrees of certainty, obligation...

Modal verbs express degrees of certainty, obligation, permission, or possibility. Considering this, which sentence conveys the strongest sense of obligation or necessity according to pragmatic language use?


A

You should bring your ID just in case.


B

You must complete the assignment before Friday.


C

You can stay a bit longer if you'd like.


D

You could ask the teacher for clarification.


E

You may want to check the schedule again.