The correct answer is C) Prussia.
An example of military readiness that was followed by other nations is Prussia.
Prussia had one of the best armies of that time. Its discipline, organization, and effectiveness were second to none. When an army has military readiness it means that all parts and units of the army are ready to initiate an invasion or an attack, always, no matter the situation. Its army, navy, and all units are ready to wage war. This military readiness was followed by other nations.