The correct answer is "People from Guam".
The Bracero Program was a series of diplomatic agreements and laws made between the governments of the United States and Mexico in order to improve the labor conditions of farm workers. These efforts started in August 1942. The reforms included the offering of better living conditions, such as sanitation, shelter, and food. The minimum wage for farm workers was set to $0.3 per hour.
During the time of the Second World War, these agreements allowed the importation of workers from the Island of Guam as an additional labor force which was needed in order to increase the output of crops during the war.