What effect do tailwinds have on aircraft landing performance?

Tailwinds affect aircraft landing performance by increasing the ground speed at which the aircraft approaches and lands on the runway. As a result, when an aircraft lands with a tailwind, the landing distance required to slow down and come to a complete stop is significantly increased. This is because the aircraft maintains a higher speed upon touchdown compared to landing into a headwind.

The effect of a tailwind means that the aircraft will be traveling faster relative to the ground as it touches down, leading to additional momentum that must be dissipated. Pilots must compensate for this increased landing distance associated with tailwinds by considering longer runways or additional stopping distances, making B the correct choice as it highlights the need for a longer distance to safely come to a complete stop in such conditions.