Correct Answer : its tailplane produces positive lift (upwards)
Explanation : An aircraft is said to be negatively stable when its tailplane produces positive lift. The tail of an aircraft without an FBW system must always produce negative lift to maintain stability and to keep the nose up. Since it produces negative lift, it actually acts in the direction of weight reducing aerodynamic efficiency. In an FBW equipped aircraft a positive lift producing tail can be used by using flight control computers and motion sensors to main stability at all times.
