Which was an immediate effect of the use of new production techniques during the period from 1900 to 1929 in t?

Which was an immediate effect of the use of new production techniques during the period from 1900 to 1929 in the United States?





1. a loss of commitment to the work ethic


2. a flood of consumer products on the market


3. an increase in the rate of unemployment


4. a sharp decline in business profits|||i think it's number two