Which development of the 1920s was caused by the increase in time-saving household inventions such as the washing machine and vacuum cleaner?

increased savings and decreased average consumer debt
increased number of women who joined the temperance movement
increased popularity of new and exciting entertainment events such as movies
increased ability of manufacturers to produce more products at lower costs

The image below is a poster from world war i: image of poster that shows a hun soldier climbing out of the water. the following message is on the poster, beat back the hun with liberty bonds. public domain what was the main purpose of this poster? to create public distrust of germans to encourage young men to enlist in the army to demonstrate the reason for entering the war to generate financial support for the war effort