Answer:
The unemployment rate increased
Step-by-step explanation:
Following the end of World war 1 in November 1918. There was a demobilization of soldiers who fought in the war. This demobilization means their services in the army are no longer needed.
Many of them thereby remain without jobs, some that went back to their jobs, render the people who took over their position jobless. In various countries of the world, many factories and businesses were no longer in existence, thereby increasing the rate of unemployment.
Hence, one of the effects of demobilization after World War I was that "The unemployment rate increased."