Answer:
A. children of undocumented immigrants
Step-by-step explanation:
Migration refers to the movement of a group of people from one geographical region (location) to another geographical destination in search of better living conditions, work or social amenities.
Migration selectivity can be defined as the likelihood or tendency that a subset (part) of a group of people are going to move (migrate) out of a particular geographical location or area.
Some of the factors that influence migration selectivity are income level, age, education, gender etc.
DACA is an acronym for Deferred Action for Childhood Arrivals. This immigration policy was introduced on the 15th of June, 2012 by President Barack Obama.
Basically, it is an immigration policy of the United States of America that allows undocumented immigrants (persons with unlawful presence) who were brought in as kids to be shielded from deportation and subsequently becoming eligible to work in the country.
Hence, President Barack Obama sought to protect children of undocumented immigrants with the DACA program.