Final answer:
During the first six months of having a class D license, the driver may not carry someone under 21 who is not a family member, among other restrictions. So, the correct answer is option b.
Step-by-step explanation:
A student with a class D license is subject to certain restrictions during the first six months of driving. One of these restrictions is that they may not carry someone other than a family member who is under 21. This means that they are only allowed to transport family members who are underage. Other restrictions during this period may include not hauling a boat or other trailer born item, and not leaving the state while driving. So, the correct answer is option b.