What indicates that you are driving in the right lane on a multiple-lane road?

The correct choice indicates that the right lane on a multiple-lane road is generally intended for slower-moving traffic and for vehicles that are not actively passing others. This traffic pattern helps maintain a smooth flow of vehicles and reduces congestion. In essence, when you are in the right lane, you should stay there unless you are overtaking slower traffic in the left lane, following the "stay right except to pass" guideline that promotes safety and efficiency on the road.

Driving in the left lane at all times is not practical as left lanes are often designated for passing or faster-moving traffic. Similarly, driving in any lane available could lead to erratic driving behavior, which may disrupt the orderly flow of traffic and increase the risk of accidents. Lastly, the notion of changing lanes every few minutes does not contribute to safe driving and can create hazards on the road. This approach can cause confusion for other drivers and is generally not considered safe practice.