Final answer:
The Tijuana Projection involves individuals with shared migration stories, highlighting the struggles associated with border policies and the daily movements of workers between countries.
Step-by-step explanation:
The common experience shared by people shown in the Tijuana Projection is a) Migration stories. This is evident from the context provided, which describes the challenges faced by families due to border policies and the need for daily migration of workers between the United States and Mexico. Additionally, the references to protests connected to various political and social issues underscore that while the specific content of protests may vary, the act of protest is a method used by various groups to express their demands and to call for changes in policy, including migration and immigrant rights.