Final answer:
A) Point 14 - the League of Nations, is considered the most beneficial of Wilson's Fourteen Points in maintaining post-war peace in Europe due to its principles of collective security and international cooperation.
Step-by-step explanation:
When considering which of President Woodrow Wilson's Fourteen Points was most beneficial in maintaining peace in post-war Europe, A) Point 14 - the League of Nations stands out. The League of Nations was envisioned as an international organization aimed at mediating disputes and preventing wars through collective security agreements.
The inclusion of Article X meant that member countries were committed to mutual defense, ensuring that an attack on one was an attack on all.
This principle of collective security was groundbreaking at the time and embodied the hope that such an international body could circumvent the need for warfare by providing a platform for dialogue and resolution.
However, the actual effectiveness of the League of Nations in achieving long-lasting peace is debated among historians due to the League's subsequent struggles to prevent aggression and the advent of World War II.