【推理类英语听力】15（在线收听）

I could tell something was wrong with the car. When I got out, I saw that all of the air was out. It's a good thing I had a spare in the trunk. I just need someone to teach me how to change it.

What is wrong with the car?

 The brakes need to be replaced

 The battery is dead

 The car has a flat tire

 It has a transmission problem