One of the serious weaknesses in American economy in the 1920s w

One of the serious weaknesses in American economy in the 1920s was _____.
A、uncontrolled speculation in the stock market
B、tariff protection
C、huge profits of big businesses
D、too much control over the banking system
【正确答案】：A
【题目解析】：本题考查美国20世纪20年代的经济。20世纪20年代美国经济的一个严重弱点是股票市场上不受控制的投机行为。