Final answer:
In general, within the United States, the youngest age to obtain a full Class D driver's license is typically 18 years old.
Step-by-step explanation:
The minimum age at which you can get a full class D driver's license varies by location, as each state or country has its own laws and regulations regarding driving privileges. However, if we're considering the general rules within the United States, the most common age at which you can obtain a full, unrestricted Class D driver's license is usually 18 years old. It is important to note that in many states, teenagers can obtain a provisional or graduated license at a younger age (often starting at 16), which comes with certain restrictions that are lifted when they turn 18 and can apply for the full license.