Final answer:
An instructor giving a behind-the-wheel lesson typically needs a Class D license and a Commercial Driver's License (CDL). The Class D license permits them to drive passenger vehicles, while the CDL allows them to operate and teach in commercial vehicles.
Step-by-step explanation:
An instructor giving a behind-the-wheel lesson must possess two specific types of licenses. Typically, the required licenses include a standard driver's license, which is often a Class D license, and a professional instructor's license, which may be a specialized certification or a Commercial Driver's License (CDL). The correct licenses ensure that the instructor is legally able to operate a motor vehicle and is also qualified to teach others to do so.
While requirements can vary by state or country, generally the Class D license allows the instructor to drive passenger vehicles, and a CDL permits them to drive commercial vehicles, which might be required if they are instructing in a vehicle classified as commercial. In some regions, there may be additional certifications or endorsements required for those teaching specific driving skills or operating certain types of vehicles.