Answer:
The correct answer is B. Assimilation.
Cultural integration is a process in which one adopts the characteristics of another group/culture, but without sacrificing the characteristics of his/her own culture.
Separation refers to a situation where a person rejects the dominant culture so that he/she can preserve their own culture.
Marginalization represents the rejection of both one's own culture and the dominant culture.
Assimilation is the correct answer here, as it refers to the process in which one becomes culturally dominated by another society, and eventually becomes indistinguishable from the other members of that society.