Hi
The answer is : 1
Collective learning.
The post war economic boom was due primarily to foreign debt. The United States made substantial loans to European countries during World War I. Although the Europeans had very little money to repay the debts, American bankers restructured the loans to facilitate repayment. Although a brief recession occured in the early part of the decade, the Roaring Twenties saw the expansion of the stock market and considerable profit for investors.
Zeby
Kebeer
Neek
T3ala
Anekak
Ya 5awal
The most important result was that Japanese was now seen as a world power and not just another Asian country that would lose to Europeans. It was the first time an Asian country won, and it established that the far East was now an important place to keep an eye on and not to mess with since they managed to beat Russians.