Which of the following is NOT a perceived advantage of alliances

A．ESA plans to extend its protection to the endangered fish in other areas.
B．It will be expensive to apply ESA's regulations for protecting the fish.
C．The new listings will Somewhat affect the urban life of some regions.
D．ESA's protection planshave always been supported by local people.

A．Travellers who fly frequently economy class.
B．Travellers who fly frequently business class.
C．Travellers who fly occasionally during holidays.
D．Travellers who fly economy class once.in a while.