He had been sitting in the car for a while waiting for us and listening to the radio . When he went to start his car the battery was dead . So we decided to take my car over there instead . I always hate having to park the car somewhere because then I have to worry is someone going to notice it or is it going to get towed or whatever .

Question: What caused the car battery to be dead ?
Answer: None of the above choices .The warranty expired on the car .The car battery was old and had to be replaced .He listened to the radio while the car was turned off and this caused the battery to die .