Please help with this

C

Explanation:

I believe the answer is arches and domes, looking at Islamic architecture it's usually consistent in arches and domes.

so they can defeat there oppenent

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.