What class of ticket would you like，（）class or business class? 那你需要定什么舱位的机票（经济舱还是商务舱）？

What class of ticket would you like，（）class or business class? 那你需要定什么舱位的机票（经济舱还是商务舱）？
A.economy
B.economic
C.economical
D.economics
正确答案：A