Why is it important to cross rail tracks at an angle of at least 45 degrees?

Answer: C — Lesser angle to catch tires

When crossing rail tracks on a motorcycle, it is essential to do so at an angle of at least 45 degrees to reduce the risk of a potential hazard known as "railway trapping." This occurs when a motorcycle's tires get caught within the grooves or gaps of the rail tracks, potentially leading to a loss of control or a crash. By crossing at a 45-degree angle or more, you minimize the risk of your tires becoming trapped in the tracks, ensuring a safer and smoother passage over them. Therefore, option C is the correct answer.