Aight.
It is already answered tho...
There are many factors that encourage migration, among them are wealth,
education, religion, access to better job opportunities and better
healthcare and personal reasons (family).
Therefore the one factor that does not influence migration is listed in option c:
c. Healthcare and education are not pull factors that encourage migration.
Global warming, loss of natural habitats, extinction of multiple species, etc
B. An oceanic plate sinks beneath another oceanic plate at a convergent boundary
