The serious economic crisis in the late 1920s and 1930s first br

The serious economic crisis in the late 1920s and 1930s first brought about by ______.
A、bank failures
B、serious unemployment
C、farm foreclosures
D、the stock market crash
【正确答案】：D
【题目解析】：20世纪20年代末和30年代的严重经济危机首先是由股市崩盘引起的。