The most accurate statement that reflects the impact WWI had on political systems is:
Select A: WWI led to the restructuring of the political order in Europe.
This statement encapsulates the widespread changes that occurred in Europe following the war, including the dismantling of empires (such as the Austro-Hungarian and Ottoman Empires), the emergence of new nation-states, and significant shifts in political ideologies. While the other options contain elements that reflect certain aspects of the post-war environment, they are more specific and may not apply universally across Europe.