在平均气动弦上，以下四点钟，位于最后面的是On the mean aerodynamic chord, amont the following four points, the most aftward is .

A、握杆中性点Stick-fixed neutral point;
B、松杆中性点Stick-free neutral point;
C、握杆机动点Stick-fixed maneuver point;
D、松杆机动点Stick-free maneuver point