What action does a green traffic light permit?

Answer: B — Proceed

A green traffic light indicates that vehicles are allowed to proceed through the intersection or along the road in the direction indicated by the signal. This means drivers have the right of way to move forward and should do so safely while being aware of any pedestrians crossing the road or other vehicles that may be coming from different directions. The other options suggest actions that are not typically associated with a green light. Stopping and waiting would be appropriate for a red light, while yielding to oncoming traffic is generally required when making left turns, particularly when there is no signal signifying that a turn is permitted. Turning left only implies a restriction that does not apply to the green light, as it allows for forward movement in any direction indicated (unless otherwise specified by additional signage). Therefore, proceeding is the correct action associated with a green traffic light.