What action must be taken if a "No Turn on Red" sign is present at an intersection?

Answer: B — Wait until the light turns green

When a "No Turn on Red" sign is posted at an intersection, it indicates that drivers must wait for the traffic signal to turn green before making a turn. This regulation is in place to ensure safety and order at intersections, as turning on red can lead to confusion and accidents, especially if there are pedestrians or oncoming traffic involved. Waiting until the light turns green allows vehicles to proceed only when it is safe to do so, thereby preventing potential conflicts with vehicles that have the right of way and keeping pedestrians safe as well. Drivers are expected to obey these signs as part of responsible driving practices to promote roadway safety for all users.