In world war i, the allied forces included france, great britain, russia, and the united states. who were they fighting?
a) the western front, mainly germany, switzerland, and italy
b) the axis powers, mainly germany, italy, and japan
c) the central powers, chiefly germany, austria hungary, and turkey
d) the eastern block, mainly germany, serbia, and croatia

C

Explanation:

A: Switzerland up to that point had not sent men into battle under Switzerland's flag for many years. It did not stop Swiss men from fighting as mercenaries however. Nevertheless A is incorrect.

B: that is the line up for WWII. B is not the answer.

C: This is the answer.

D: Serbia was the scene of the event that brought about WWI. Archduke Ferdinand (future heir to the throne of Austria Hungary) and his wife Sophie were assassinated on Serbian soil in Sarajevo and Austria Hungary immediately declared war. C still is your answer.