Thank you L337! To BOAC：this is a ATPL exam question.
The full question is like this:
In an aircraft with a flying tail ,as the pilot moves the control column
A.the tailplane moves and the elevator moves in the opposite direction
B.the tailplane moves and the elevator moves in the same direction
C.the tailplane moves and the elevator is faired
D.the tailplane is faired and the elevator moves
I thought
flying tail means a stabilator or a moveable stabiliser + elevator
just like you said:
The 737, for example, however, uses ONLY the elevator for primary pitch control, and the tailplane is then 'trimmed' to a new position if necessary to trim the a/c.
So the pilots primary means of controling the stabiliser is by use of the stab trim switches .