What is the primary responsibility of a school bus driver concerning student safety?

The primary responsibility of a school bus driver concerning student safety encompasses all aspects of ensuring a safe environment for the students being transported. This includes ensuring that all students are seated before the bus is in motion, as this helps to prevent injuries during transit. By monitoring road conditions, the driver can respond appropriately to any hazards that may arise, further safeguarding the passengers. Following the bus route accurately is also critical, as deviations can lead to confusion or unsafe situations for students getting on or off the bus. Therefore, the comprehensive nature of the role combines these responsibilities, making choice D the correct answer since it acknowledges that each element works together to prioritize student safety during transportation.