Why did Los Angeles's population increase significantly during the 1920s?
A. Many East Asians emigrated to the United States, and most arrived in Los Angeles first.
B. Many misplaced Midwest farmers came looking for jobs.
C. Mexican immigrants in the Southwest were allowed to remain in the country if they labored in Los Angeles
agribusiness.
D. As thousands of factories closed in the Northeast, most of their workers migrated west.
E. The Hollywood film industry became the biggest private employer in the United States.