Final answer:
A G1 driver in Ontario must be accompanied by a fully licensed driver with at least 4 years of experience.
Step-by-step explanation:
As a G1 driver, you must be accompanied by a fully licensed driver with at least 4 years of driving experience. The correct answer is a) 4 years. This requirement is in place to ensure that novice drivers have a qualified and experienced guide while they are learning and gaining the necessary skills to drive safely and confidently on the roads. It's important for G1 drivers to adhere to this and all other restrictions to maintain safety and legality until they are fully licensed.