What does a red traffic light signify?

Answer: C — Drivers must stop and wait until the light turns green

A red traffic light signifies that drivers must stop their vehicles and wait until the light turns green before proceeding. This rule is fundamental for maintaining order and safety at intersections. Stopping at a red light allows for safe travel across the intersection and ensures that other road users, including pedestrians, can cross safely. It is critical in preventing accidents by clearly indicating to drivers when to halt their vehicles rather than proceed through the intersection. The other options suggest actions that either compromise the safety of the driver or other road users or misinterpret traffic laws. For instance, yielding to oncoming traffic is unnecessary when stopped at a red light, as the driver is required to be stationary. Increasing speed to clear an intersection can create perilous situations, and turning right without stopping is allowed only under specific conditions and often requires a stop to ensure safety.