Consider the following information before answering the question below: Eric wants to calculate how responsive the quantity of football tickets (FB) are to the price of airline tickets (AT). He uses the following formula, but makes a mistake in his calculations. %AQ AT %APFB Which of the following correctly identifies Eric's mistake ? O A. He is calculating how the Quantity Demanded of Airline Tickets (AT) responds to a change in the price of Football Tickets (FB) instead. B. He is calculating the Price Elasticity of Demand for Airline Tickets. O C. He is calculating the Income Elasticity of Demand for Airline Tickets instead, O D. He is calculating the Price Elasticity of Demand for Football Tickets. O E. He has reversed the numerator and the denominator