Questions Are Based on the Following Image

Questions are based on the following image.
Indian infantry in the trenches at Fauquissart, France, 1915
-The image demonstrates which of the following about the war?

A) That the morale of soldiers was high
B) That soldiers were well prepared to deal with the physical and psychological impacts of the war
C) That the massive manpower required by modern warfare included calling up soldiers from overseas colonies
D) That soldiers from colonies were readily integrated into the units of their colonizers