Normalization vs. Naturalization

Naturalization is when you become a citizen of another coutry but not by birth or blood, and Normalization is refers to a process that makes something more normal or regular. Most commonly it refers to: Normalization (sociology) or social normalization, the process through which ideas and behaviors that may fall outside of social norms come to be regarded as "normal"

It’s either d or b ! but it might be b