What are the big three countries that involved in the treaty? ?

While the Allies at the Paris Peace Conference made up more than twenty nations, the Big Four entered Versailles and were leading architects of the Treaty of Versailles which was signed by Germany; the Treaty of St. Germain, with Austria; the Treaty of Neuilly, with Bulgaria; the Treaty of Trianon, with Hungary.

hello,

your answer whould be d

geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to