It was going to be a long winter during his commute, the heater had gone out in his what?\nOptions:\n- office\n- house\n- automobile\n- living room\n- public building
Step-by-step reasoning process below:

User
Automobile is a vehicle used to transport. Commute means travel some distance between one's home and place of work on a regular basis. Commuting is done using some means of transport. The answer: automobile.
Assistant