According to Historian John Lukacs, What Are Considered ​The Landmark

According to historian John Lukacs, what are considered ​the landmark events that mark the beginning and ending of the 20th century?

A) ​The Spanish-American War and the First Gulf War.
B) ​The Industrial Revolution and the Post-industrial Revolution.
C) Western Imperialism and the invention of the Internet​
D) ​The Spanish-American War and the September 11 attacks.
E) ​World War I and the collapse of communism.