What were the foreigners allegedly doing to the water wells?

Most common problems with well water are simply aesthetics, but there can also be more serious concerns. While groundwater found in private wells is less susceptible to pollution than surface water, it is certainly possible for wells to become contaminated.

i think its either b or c

explanation:

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation: