Final answer:
The Triple Entente, formed before World War I, originally included France, Great Britain, and Russia. Italy joined later after initially being part of the Triple Alliance, and the United States entered the war in 1917 on the side of the Entente.
The correct answer to the question is c) Russia.
Step-by-step explanation:
When asked about the Triple Entente, we are referring to a military alliance that was formed in the years leading up to World War I. This alliance originally consisted of France, Great Britain, and Russia. The correct answer to the question is c) Russia. Italy was initially part of the Triple Alliance with Germany and Austria-Hungary but switched sides to join the Entente in 1915. The United States later joined the conflict on the side of the Entente in 1917. Therefore, the Triple Entente included Russia, not Italy or the United States. Japan, while an ally to the Entente forces, was never a part of the original Triple Entente agreement.