A customer comes into the Taxpayer Assistance Center with a Balance Due notice that she doesn't understand. You have limited knowledge gained through Taxpayer Assistance Center experience, but you haven't received the training on these types of issues yet, and all of your co-workers are busy assisting other customers. What would you do in this situation? A. Assign the customer to the next available Individual Taxpayer Advisory Specialist who is qualified to answer the question. B. Ask the customer to wait while you consult with your manager as soon as he becomes available. C. Review the customer's account and provide an answer based on the training you have received. D. Ask a co-worker to step away from his customer to provide you with assistance. E. Research reference documents to attempt to find an