Which of the following does NOT increase your safety when riding at night?

Answer: D — Passing slower vehicles

Passing slower vehicles does not increase your safety when riding at night. The action of passing slower vehicles involves changing lanes, which can increase the risk of an accident, especially in low-light conditions where visibility is reduced. It is important to maintain a safe following distance, use high beam headlights when appropriate, and wear reflective clothing to increase visibility and overall safety when riding at night.