If one of your clients wants to order municipal securities that you believe to be unsuitable for her investment objectives, what should you do$?$

You may execute the order as long as you mark the order ticket as $$unsolicited$.$

You must obtain the permission of the firm$$s compliance officer before executing the order.

You may only execute the order with the prior permission of a principal of the firm.

You must refuse the order unless the client changes her investment objectives.