試題詳解

6. In mid-2008 Delta increased the price of a New York to LA ticket by 10 percent. As a result of this price hike, there was a ______ shift in the demand curve for a ticket on Continental because the price of a ______ had risen.
(A) rightward； complement
(B) leftward； substitute
(C) leftward； complement
(D) rightward； substitute