Which of the following best describes a dependent regarding Utah driving regulations?

The correct answer highlights that a dependent under Utah driving regulations refers specifically to a spouse and any unmarried children under the age of 21. This designation is important for various legal purposes, including insurance and registration, as it helps define who is covered under a family policy or plan. It recognizes the role of the entire immediate family while also emphasizing the restrictions concerning marital status and age.

This definition ensures that both the spouse and children are considered part of the household for driving-related matters, which can influence insurance rates, coverage eligibility, and legal responsibilities while driving. By including the spouse as well as unmarried children under 21, it captures the typical family structure relevant to driving laws and supports the intent of protecting family members on the road.