Sally has to decide whether to take the bus or drive to work.The bus ride costs $1.25.

题目

Sally has to decide whether to take the bus or drive to work.The bus ride costs $1.25.
The drive costs $1.17 in gas,but will add $0.08 in wear and tear on her car.According to the cost-benefit principle,if all she cares about is money,Sally should...
A.take the bus.B.drive.C.not prefer either over the other.

答案