Is 'should' used for permission or obligation? Explain your answer. ...

★ Modal Verbs for Permission and Obligation

Is ‘should’ used for permission or obligation? Explain your answer.

A. suggestion

B. request

C. advice

D. obligation

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What is the difference between permission and obligation?

A. Obligation allows an action; permission requires an action.

B. Permission allows an action; obligation requires an action.

C. Permission is a type of obligation.

D. Permission is the same as obligation.