The best answer is A. It was a time of cultural changes..
The ten years between 1919 and the onset of the Great Depression at the end of 1929 encompassed a period of unprecedented economic prosperity and cultural experimentation as well as political conservatism and religious fundamentalism. Having experienced the constraints of wartime, many Americans feverishly pursued personal pleasures. The new and unusual clashed openly with the conventional and the commonplace. Modernists and traditionalists waged cultural warfare with one another, one group looking to the future for inspiration and the other looking to the past for guidance.
It causes slave rebellion and anti-colonial uprising. They founded the first black republic in modern history that they called Haiti.
Environmental issues are not taken as seriously, people believe the environment is sustainable and often they are afraid to think to deep into what might actually happen to the environment if not treated correctly. However economic issues are easy because it is directly going to impact the people. Environmental issues are future issues, economic issues are present issues.