Final answer:
If you are 16 or 17 and have had your license for 6 months, restrictions usually apply to teenage passengers like friends. Your 18-year-old friend would likely not be allowed as a passenger, whereas your parents and your younger brother would typically be exempt from such restrictions.
Step-by-step explanation:
If you are 16 or 17 years old and have held a license for 6 months, the rules about who can be a passenger in your vehicle can vary depending on the state's graduated licensing laws. Typically, during this intermediate phase, unsupervised driving is allowed but with certain restrictions regarding passengers to minimize distractions and decrease the risk of accidents. One common restriction is that only family members are allowed as passengers, particularly for younger, inexperienced drivers.
Given the choices provided, the passenger most likely to be restricted in such a scenario would be A. Your 18-year-old friend. Your parent(s) would not be restricted, as they are guardians and their presence is often required or highly recommended to ensure safety and adherence to driving laws. Similarly, your younger brother would typically also be allowed, as most laws allow immediate family members to be passengers.
However, it is very important to check the specific laws of your state, as these rules can differ widely, and exceptions might apply based on specific circumstances or permits.