Final answer:
The Truck Equipment Handbook is published by The National Truck Equipment Association (NTEA), which serves the commercial vehicle and work truck industry.
Step-by-step explanation:
The Truck Equipment Handbook is a reputable publication for commercial vehicle certification requirements and regulations. The correct answer for the source that publishes this handbook is D) The National Truck Equipment Association (NTEA). The NTEA is an industry association that serves companies in the commercial vehicle and work truck industry, providing resources such as the Truck Equipment Handbook to ensure adherence to relevant laws and safety standards.