Multiple Select Question

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During his question$-$and$-$answer session, Don is confused by a question. What two actions should he take?

Multiple select question.

He should disagree with whatever is being asked and move on to the next question.

He should ask the audience member to repeat the question.

He should rephrase the question to make sure he understands it$.$

He should say he does not understand the question and move on to the next person.