Respuesta :
					                   D. The process of becoming a citizen in a country 
It's because the definition of "naturalization" would mean the admittance of a foreigner to the citizenship of a country.
Ex.
"an application for naturalization as a american citizen"
					                
					             It's because the definition of "naturalization" would mean the admittance of a foreigner to the citizenship of a country.
Ex.
"an application for naturalization as a american citizen"
					                   The answer is the process of becoming a citizen of a country.
					                
					                
					             