The Supreme Court declared segregation to be uncostitutional in 1954 in Brown v. Board of Education.
The French Revolution was a bloody war. The most known part of it was called "The Terror"... You see, it was called like that because because of the Guillotine. Many were killing aristocrats and rich families .Some families were being mistaken for rich and were killed. The French Revolution could be itself described "Terror". ;(
The correct answer is B) emergence of a written language
Unlike the other mentioned things, emergence of a written language did revolutionize Native American cultures. Everything else mentioned here was just there and completely normal as they were hunters and what not.
The correct answer is A, as the Battle of Midway is considered a turning point in WWII, when US destroyed 4 Japanese aircraft carriers while losing just one US carrier.
The Battle of Midway was a naval battle between the Japanese and the American Navy at the Midway Islands in the Second World War. The battle was induced by Japan and lasted from June 4 to June 1942. It took place six months after the Japanese attack on Pearl Harbor, which led to a state of war between Japan and the United States, and about a month after the Battle of the Coral Sea. The Battle of Midway resulted in the US forces rejecting the attack and destroying 4 Japanese aircraft carriers and a heavy cross against their own loss of an aircraft carrier and a destroyer.