Final answer:
To begin practice driving, a GDL driver must hold a learner's permit, in addition to a valid registration and insurance card.
Step-by-step explanation:
Before practice driving can begin, in addition to a valid registration and a valid insurance card, the GDL driver must also have:
A) A learner's permit
The requirement for a learner's permit ensures that the GDL driver has already been through a certain amount of testing and instruction to understand the basics of traffic law and driving safety. While a supervising driver and, in certain cases, an approved driving instructor, are typically required during the learner phase, they are not mentioned in the options provided. A reflective vest is not a standardized requirement for learner drivers across various jurisdictions.