What is the minimum required tread depth on steering tires?

Answer: B — 4/32 inch

The minimum required tread depth for steering tires is 4/32 inch. This specification is crucial for maintaining adequate traction and control while driving, especially in adverse weather conditions. Adequate tread depth helps to channel water away from the tire's contact surface, reducing the risk of hydroplaning and ensuring more effective braking and handling. Steering tires, which are responsible for directional control, require sufficient tread to provide the necessary grip on the road. Ensuring that the tread depth does not fall below this minimum helps promote safety for both the driver and others on the road.