问题详情

According to paragraph 4, what can be inferred about investors before the Great Depression？
A．They invested too heavily in dotcom stocks.
B．They were motivated by a greed that was wholly self-destructive.
C．They did not understand the stock market as well as we do now.
D．They could only invest in bonds and gold because there were no stocks.请帮忙给出正确答案和分析，谢谢！