Which theme does not summarize the major developments of the 20th
century?
A. Decolonization and nationalism
B. Human and civil rights
C. Declining globalization
D. Unresolved global conflicts

no

explanation:

martin luther believed that selling indulgences was wrong and gave people a license to sin. the roman catholic church used the practice of indulgences to raise money for major building projects.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.