Periodization is a useful concept to apply when: A. constructing a narrative about a single moment in time.
B. organizing the history of mexico into three distinct units of time
C. comparing the Jewish and Gregorian calendars.
D. distinguishing between arguments made by two different historians.

B. Organizing the history of Mexico into three distinct units of time.

Explanation:

Periodization is the process of organizing or systematically arranging/ classing things in accordance to their time periods. This allows for easy classification or understanding of the tie periods and their aspects/ important facts.

This concept is useful for organizing the history of Mexico into three distinct units of time. As periodization deals with the time periods, this categorizing of Mexican history into the three sections will help in analyzing them according to their common characteristics. This study of the history of Mexico within different time periods will enable the readers to better understand the historical facts in a much easier and more compact way.

Thus, the correct answer is option B.