My truck took a dump on me tonight . I went to lunch and it was running fine ; when I came out to head over to the Tech Center it would barely start and would die if I gave it any gas . After about 20mins of poking around under the hood I found that the Mass Air Flow Sensor took a dump and if I unplugged it the truck goes into a " limp " mode so I could get back on the road . It did n't drive like normal but at least I was moving again .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason why their truck broke down ?
Options:
- The truck is new .
 - They are n't taking good care of it .
 - None of the above choices .
 - The truck is old .


The truck is old .