What action is permitted in the center lane of a two-way roadway?

Answer: C — Left turns by either direction

In the context of a two-way roadway, the center lane is typically designated for left turns. This means that vehicles traveling in either direction can use this lane to turn left safely without disrupting the flow of traffic in the other lanes. It provides a space for vehicles to wait until it is safe to complete their turn without blocking the straight-through traffic. This use of the center lane is designed to enhance safety by providing a dedicated space for such maneuvers, reducing the chances of collisions that could occur if left turns are made from travel lanes where other vehicles are moving. It is important for drivers to signal their intentions and check for oncoming traffic when using this lane for turns. Other actions, such as right turns only, parking, or U-turns are either not permitted in this lane or could create hazards to other drivers, which is why they aren't suitable in this context.