From the lettered A to E below the sentence, choose the word or group of words that is nearest in meaning to the underlined expression as it is used in the sentence.
The principal's orders are imperative.

From the lettered A to E below the sentence, choose the word or group of words that is nearest in meaning to the underlined expression as it is used in the sentence.
She tried to settle the quarrel but the man remained obstinate to listen to her.