Answer:
c. Western civilization will enter a period of decline.
Step-by-step explanation:
In "The Second Coming," Yeats talks about what he believes will most likely happen to Western civilization. He describes the events of the 20th century, particularly the devastation of World War I. As the world following the war is chaotic, he describes it in negative terms. Part of this negative view is the idea of Western civilization declining in the near future.