Answer:
C. kingdom
Step-by-step explanation:
The biological classification system was designed to select living beings in categories that would facilitate the study of these beings by scientists, in addition to determining a certain degree of similarity and ancestry between living beings. In these systems, organisms are classified according to their common characteristics. The first category is the species, the second is the genus, the third is the family, the fourth is the order, the fifth the son and the sixth the kingdom. Thus, we can say that if two organisms have the same phylum, they also have the same kingdom.