Read the following context and choose the best option to answer the question.
Context: This means that during the winter I must select either the floor / defrost mix , or the vent position , both of which work as intended . I ' ve managed to survive two upstate NY winters with the heater in this state of disrepair . It requires next to no maintenance , and what it requires does n't cost very much .
Question: what is the sort of " heater " that has defrost on it ?
Options: 
- It is a special personal warmer for office use .
 - It is a payne heater .
 - None of the above choices .
 - It is the heater in a car .


It is the heater in a car .