单选题 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 Springtown 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

【正确答案】 D
【答案解析】