What is a common restriction associated with a learner's permit?

Answer: B — Limit on the number of passengers and no driving at night

A common restriction associated with a learner's permit is the limitation on the number of passengers and restrictions on driving at night. This is designed to ensure that new drivers have a controlled environment as they gain experience. When learner drivers are limited on the number of passengers, it reduces distractions in the vehicle, allowing them to focus better on the act of driving and develop their skills in a safer manner. Additionally, the restriction against driving at night helps to further minimize risks, as night driving presents additional challenges such as reduced visibility and increased fatigue. These measures are part of the graduated licensing system aimed at improving safety for novice drivers by allowing them to gain experience progressively in less difficult driving conditions while still under the supervision of an experienced driver.