Anna wrote this paragraph to answer the research question, "What was one cause of the Great Depression?” Supply and demand was one major cause of the Great Depression. During World War I and the years that followed, farms and factories were producing large quantities of goods. However, wages did not rise even as the cost of these goods did, so many people could not afford these goods and services. As factories and farms realized this, they cut back on production and laid off workers, leaving more and more people unable to purchase goods and services. A lot of men began to roam the countryside looking for new jobs. Thus, the trend continued: as more people were unable to buy things, more workers lost their jobs. Based on the research question, which sentence is an unnecessary fact or detail?