I think the correct answer is
(A) changing in abiotic factors
The most popular system is run on smartphones and it is android.
I believe the answer is: Integrative theory
Integrative theory view that society could never be exist unless each individuals fulfill their own roles. These happen because humans are unique in terms of our talent/capabilities. So in order to crate a well functioning society, different humans had to integrate our different capability to operate it.
One of the main goals are to bring their religion. roman was Catholicism, to the area as well. the area are very heavy as of today
