About the fourth development stage of American Jewish literature， which are right？ （ ）。
选项：

A:In politics, in the 1950s, the United States was full of closed and conservative ideas.
B:The fourth period was from 1945 to 1973.
C:During this period, the economy of the United States developed rapidly.
D:American Jewish writers dominated the American literary world and became outstanding writers in this period.