Which of the following accounts for an increase in auxiliary HVAC systems on late model trucks?

A) Drivers are not as hardy today
B) Anti-idling legislation in some areas
C) Diesel fuel today has more sulfur
D) Drivers sleep better without the engine noise

Auxiliary HVAC Systems

Secondary heating, ventilation, and air conditioning systems installed in large vehicles or buildings for additional climate control.

Anti-idling Legislation

Laws or regulations aimed at reducing vehicle idle time to cut down on pollution and fuel consumption.