Because of the exuberant, freewheeling popular culture of the decade. The Roaring Twenties was a time when many people defied Prohibition, indulged in new styles of dancing and dressing, and rejected many traditional moral standards.
Nature that the people were around (for example, people near ocean would have a word for it, others wouldn't and then would "borrow" that word) and separation from other people who originally spoke the same language
I would think the answer would be D
The brinkmanship which is one of the strategies of the United States failed to prevent the Vietnam war because when American founded attacks, the Vietnamese fought back along using the guerrilla strategy and these Vietnamese think that all men are created equal.