100 Point, Will Mark brainily if right! Modernism, and the whole Modernist movement in literature, came from World War I, which proved that old ideas were wrong and everyone would have to reconsider them. It started like any European war, but technology made it much worse and hard to cling to the old.
Which most effectively revises the passage in order to maintain a formal style and tone?

A.
Among the events that started Modernism, World War I was a biggie. Aircraft, chemical attacks, and other really bad things made clinging to old ideas about romance, valor, and glory difficult for those who lived during a really bad period in European history.

B.
Modernism in the literary arts was a direct consequence of the disastrous conflict known to all as World War I, which involved a crazy assortment of innovative and destructive technologies that rendered old ideas of valor and glory difficult for people to keep wrapping their heads around.

C.
World War I was a major cause of the Modernist movement in literature. Although the conflict started like any European war, terrible new technologies, such as aircraft and chemical attacks, made it hard for soldiers and civilians alike to cling to old, romantic notions of valor and glory.

D.
Aircraft, tanks, chemical attacks: These were just some of the awful things that made World War I a major cause of Modernist literature. This was a result of soldiers and civilians feeling like they couldn't cling to old notions of valor and glory because the things that happened were really terrible.