Read the excerpt from “Albert Schweitzer: A Life of Service and Sacrifice.” During their second year in Africa, a setback occurred. World War I had begun, and France and Germany were now enemies. As Germans working in a French colony, Albert and Helene were regarded as possible spies. The two were captured and sent to France as prisoners of war.

According to the excerpt, what occurred as a result of World War I?

A. Albert and Helene became spies for Germany.
B. Albert and Helene worked in a French colony.
C. Albert and Helene became enemies of the French.
D. Albert and Helene were imprisoned by the French.