There is no need to calculate any masses in this question. We are being asked only what our solution is to the aircraft being over weight.

Looking at the answers:

'The aircraft has a 550 kg overload and the captain must reduce the traffic load by 550 kg.' --> CORRECT. Although this will cost the operator money, the fuel that has been decided can be considered essential. There is:

• Captain's discretionary fuel of 500 kg and
• Extra fuel of 550 kg

but both of these are required for the safe operation of this flight.

'The aircraft is within limits, and the flight can proceed without adjustments.' --> INCORRECT. The question clearly states that the aircraft is 550 kg over weight. The flight can simply not proceed in this condition.

'The aircraft has a 550 kg overload and the captain must remove 550 kg of extra fuel.' --> INCORRECT. The extra fuel is required to compensate for the long taxi. Although we are dipping in to the Flight Planning syllabus, if that extra fuel is required then it must be carried for the safe operation of the flight.

'The aircraft cannot depart because the MTOM, MLM, or MZFM limits are exceeded.' --> INCORRECT. At first look, this seems a fine answer, however, the aircraft can depart if some of the weight is removed and the limits respected. This answer perhaps indicates that the flight is grounded.