Under Chain of Responsibility, which party can be held liable if a consignor's delivery schedule is so tight that the driver must speed or drive fatigued to meet it?

1. Only the driver, because they are the one who chose to speed
2. Only the transport operator, because they agreed to the schedule
3. Both the driver and all parties in the chain who contributed to the unsafe situation, including the consignor
4. No one is liable if the cargo delivery was time-critical