What historical event introduced Daylight Savings Time?

Choose the best answer from the options below:
A Julius Caesar becoming Roman Emperor
B The Crusades of the 12th Century
C The Civil War of 1861-1865
D World War I of 1914-1918
E Word War II of 1939- 1945

D World War I of 1914-1918

The correct answer is D) World War I of 1914-1918. Daylight Savings Time was introduced in many countries during World War I as a way to conserve energy.