The first major use of American troops in europe in 1918 came at a critical time because a) Germany had transferred it’s soldiers from the eastern to the Western from
b) The Russian Bolsheviks had been sending troops to help Germany
c) Germany had begun to bomb British cities
d) German troops had just captured the bulk of the French army

I think its C because America enters the war when German started sinking there merchants ships.

c) the invasion of the shang

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.