The most accurate response to the significance of the Treaty of Versailles in shaping the post-World War I world is:
B - It imposed harsh penalties on Germany, leading to instability.
The Treaty of Versailles included severe reparations, territorial losses, and military restrictions imposed on Germany, which contributed to economic hardship and political instability in the country. This instability is often cited as a contributing factor to the rise of extremist movements, including the Nazi Party, and ultimately led to World War II.