Triple

Target class: formation of the Australian Imperial Force
Context triple: [Australian Mounted Division, instanceOf, formation of the Australian Imperial Force]

• A. Kitchener's Army formation
  Kitchener's Army formation is a military unit composed of volunteer soldiers raised in response to Lord Kitchener's call for mass enlistment during World War I, typically organized into new divisions distinct from the pre-war regular army.
• B. formation of the British Armed Forces
  The formation of the British Armed Forces refers to the historical process by which England’s separate military services—Army, Royal Navy, and later Royal Air Force—evolved, professionalized, and were unified under the authority of the British state to create a coordinated national defense establishment.
• C. Australian Army formation chosen
  An Australian Army formation is a structured military organization composed of multiple units and sub-units, established to plan, coordinate, and conduct land operations under a unified command within the Australian Army.
• D. World War I military formation
  A World War I military formation is an organized grouping of soldiers, equipment, and command structures arranged for combat operations according to the tactical doctrines and technological constraints of the 1914–1918 conflict.
• E. Australian Defence Force formation
  An Australian Defence Force formation is an organized, hierarchical grouping of military units from one or more services, structured to conduct specific operational, training, or support missions under a designated command.
• F. None of above.