C. it was able to use military bases in allied territories i think
Tanks could be used to open a hole in enemy lines, but the burnt of the fighting must be done by infantry units. Early tanks for the allies had limited transverse movement for the turret, because their primary purpose was to serve as a gun platform for the infantry units coming behind them.
Richard Lion-heart is England's King and Saladin was a Muslim military and political leader who as Sultan led Islamic forces during the Crusades.