When did world war 1 started?What happend during it?

World War I, also known as the Great War, began in 1914 after the assassination of Archduke Franz Ferdinand of Austria. ... 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:

July 28, 1914 – November 11, 1918

World War I, also known as the Great War, began in 1914 after the assassination of Archduke Franz Ferdinand of Austria. His murder catapulted into a war across Europe that lasted until 1918.

Explanation:

yup! you are correct it is b.