陈向东逻辑的一道题

Springtown’s fire department wants the town council to buy it another ladder truck. These trucks are useful in fighting fires in high-rise buildings. The town council argues, however, that spring town has only two high-rise buildings, and it already owns enough ladder trucks to fight any fires there. So they say, Springtown does not need another ladder truck

The town council’s argument assumes that

A)     at least one of Springtown’s ladder trucks is not due to be permanently removed from service in the immediate future.

B)      It is possible to fight fire successfully in high-rise building without using ladder truck

what is your question, and where are the complete choices?