You are currently preparing to board a full flight at the gate. A customer approaches the gate with a carry-on bag that clearly exceeds the carry-on baggage size limits. Carry-on bags exceeding the size requirements should be gate checked by the Customer Service Representative. The customer tells you that she has used this bag as a carry-on several times in the past. What would you do? A) Allow the customer to board with the carry-on bag even though it does not meet the requirements B) Use the baggage sizer to show the customer that her bag does not meet the requirements and ask her to gate check her bag C) Call a supervisor to handle the situation D) Tell the customer that the other employees should not have allowed her to use the bag as a carry-on in the past