Unlike outside and backstage , it was cool in the bus . He mentally thanked their bus driver for switching on the airco this morning as he made his way to the living room area . He flopped down on the large , brown sofa and closed his eyes , sighing again .
According to the above context, choose the best option to answer the following question.
Question: Why would the air in the bus be turned on ?
Options:
A. None of the above choices .
B. To block out external noise when they close their eyes to sleep .
C. To combat the sunny weather outdoors .
D. To raise the temperature and combat the cool air .


C