If an aircraft is statically stable it will tend to return to its original attitude following a disturbance.
If it then osciliates with decreasing amplitude it is both statically stable and dynamically stable.
If it oscillates with increasing amplitude it is statically stable but dynamically unstable.
In this question the aircraft does not tend to return to its initial attune, so it is statically unstable.
Because there are no oscillations, the concept of dynamic stability is meaningless in this case.