Which best describes immigrantts in the 1920s who were known as braceros?

Braceros in the 1920s were Mexican laborers who were brought to the United States under temporary work programs to address labor shortages, particularly in agriculture and railroad industries. This program was a response to the demand for labor during World War II but laid the groundwork for similar arrangements in later decades. The term "bracero" translates to "manual laborer" in Spanish, and these workers often faced challenging conditions, low wages, and limited rights. Their contributions significantly impacted the U.S. economy and workforce during that era.