I think you forgot to give the options along with this question. I am answering the question based on my knowledge and research. The historical event that would be most useful to include would be President Johnson's escalation of the Vietnam War after the Tonkin Gulf incident. I hope the answer helps you. <span />
Answer: One of the big changes in art was to paint and sculpt subjects realistically. This is called realism and involves a number of techniques that make the subjects and background look like they would in real life. This also meant giving the subjects more emotional qualities.
Jazz had its biggest moment in the 1920's so that's out. Speakeasies were very famous because cops were always taking these liquor stores down. And of course, flappers were famous at liquor stores and jazz so i believe football is out ;)