When changing lanes, you can check your blind spots by:

Answer: D — Turning your head and looking over your shoulder.

When changing lanes, turning your head and looking over your shoulder is the most effective method for checking your blind spots. This action allows you to have a direct line of sight to areas beside and behind your vehicle that are not visible through your mirrors. Blind spots are natural limitations in your vehicle's design, and turning your head provides a clear view of any vehicles or obstacles that may be in those areas. While using mirrors is important for overall situational awareness, they cannot always capture everything in adjacent lanes. For example, vehicles can enter or exit the blind spot too quickly or be positioned in a way that makes them invisible in mirrors. By physically turning your head, you supplement the visual information provided by the mirrors, ensuring that it is safe to change lanes without risking a collision with another vehicle that may be present.