Final answer:
Carriers must give each driver a hazardous materials endorsement (HME) on their commercial driver's license (CDL).
Step-by-step explanation:
When transporting class A or B explosives, carriers must give each driver a hazardous materials endorsement (HME) on their commercial driver's license (CDL). This endorsement is required to ensure that drivers have received special training and are aware of the guidelines and safety precautions necessary for transporting explosives.