El Nino - it is a difficult question to answer as there is no simple answer. Perhaps you can say where the question comes from? What was answer 'A'?
A 'flying tail' normally moves as one piece, with the elevators (if there are any) locked to the tailplane. In the event of a failure of what is moving the tailplane some aircraft can 'unlock' the elevators from the tailplane and then fly using just the tailplane. The control effect is as you state.
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.
Edit to add: there have been a/c where the elevator moves and the tailplane automatically follows, although I do not know of any like modern a/c like that.