Question id 88 - Mass and Balance - ATPL - Airline Transport Pilot license

Chosen on the longitudinal axis of the aeroplane, and necessarily situated between the nose and the tail of the aircraft
Chosen on the longitudinal axis of the aeroplane, but not necessarily between the nose and the tail of the aircraft
Chosen on the longitudinal axis of the aircraft, and always at the fire-wall level
Chosen on the longitudinal axis of the aircraft and necessarily situated between the leading edge and trailing edge of the wing