Final answer:
The driver of a school bus containing pupils can only transport pupils to school and back.
Step-by-step explanation:
The correct answer is B) Only transport pupils to school and back.
When the question refers to the driver of a school bus containing pupils, it implies that the bus is specifically designated for transporting students to and from school. Therefore, the driver's main responsibility is to only transport pupils to school and back, as stated in option B. The driver is not allowed to pass other vehicles in any situation (option A), carry non-pupil passengers (option C), or exceed the speed limit by 10 mph (option D).