The correct answer is C. C & W.
The C & W officer is responsible for the safe and efficient operation of cranes and other lifting equipment. They are also responsible for the removal of wreckage after accidents.
The A. Engineering officer is responsible for the design and construction of cranes and other lifting equipment.
The B. Mechanical officer is responsible for the maintenance and repair of cranes and other lifting equipment.
The D. None of these option is incorrect because the C & W officer is the senior most officer who is personally responsible for ensuring and efficient handing of cranes and removal of wreckage after accident.