Which of the following defines the zone that extends as much as 30 feet from the front bumper, 10 feet from the left and right sides of the bus and 10 feet behind the rear bumper of the school bus?

The danger zones may extend as much as 30 feet from the front bumper (with the first 12 feet being the most dangerous), 12 feet from the left and right sides, and 12 feet behind the rear bumper of the school bus. In addition, the area to the left of the bus is always considered dangerous because of passing cars. [Commercial Driver Handbook]