What was one of the major effects of World War I on Europe's social order?

The choice that correctly identifies one of the major effects of World War I on Europe's social order is the destruction of social order. The war brought about significant societal upheaval, resulting in widespread devastation not just physically, but also socially and economically. The collective trauma experienced by nations and communities disrupted established social hierarchies and relationships, leading to increased class tensions and political instability.

The aftermath of the war saw the collapse of empires, such as the Austro-Hungarian and Ottoman Empires, which fundamentally changed the political landscape of Europe. In addition, the war's human cost—millions of lives lost and many more wounded—altered demographic structures, affecting families and communities and leading to a sense of disillusionment among the populace.

These shifts created a fertile ground for social movements, revolutions, and changes in governance, as people sought to redefine their societal roles and political systems. This upheaval laid the groundwork for significant changes throughout much of the 20th century, including the rise of totalitarian regimes in some countries, along with civil unrest and social change movements in others.

In contrast, the other options reflect outcomes that either did not occur or were not sufficiently impactful in comparison to the overwhelming social disruption caused by the war