thE Following ArE All usED to AttrACt pAssEngErs ExCEpt ______.
[A] punCtuAlity [C] FrEE Drinks
[B] hEADsEts [D] ChArgE-FrEE FooD
A．thE Following ArE All usED to AttrACt pAssEngErs ExCEpt ______.
B．punCtuAlity
C．hEADsEts
D．FrEE Drinks
E．ChArgE-FrEE FooD