Final answer:
John Garcia mainly tests on dispossession and power dynamics within the United States and Mexico, including the impact of immigration and migration on access to healthcare and identity formation.
Step-by-step explanation:
John Garcia mainly tests on the subject of dispossession and power dynamics within the United States and Mexico, including how immigration and migration affect access to health care and shape identity. His work focuses on studying coercive rehabilitation centers in Mexico City, specifically addressing the impact of these centers on marginalized communities. Through her research and publications, Garcia aims to provide a better understanding of these social issues and their implications.