Crystal agreed to serve on a company's advisory board as well as now has to contact them to say she cannot attend a scheduled meeting where she was to be one of several key speakers. What must she do? A. Offer to send an expert colleague in her place. B. Ask the company to abandon the meeting. C. Leave from the advisory board before the meeting date. D. Let the company distinguish she cannot not attend as well as that they will have to make arrangements for another speaker