What role do turning points play in the process of periodization?
O
A. They ensure that historians are unbiased when defining periods.
B. They require historians to look for thematic connections between
different periods.
O
C. They simplify historians' organization of past events by making all
periods the same length.
D. They reflect historians' points of view on a period's most
important events.

The correct answer is letter D

A Turning Point is a particular time or incident that marks the beginning of a completely new stage in someone's life or in the development of something.

This turning point is always used to refer to major historical changes, such as the end of certain eras for the beginning of a new era, such as the middle and modern ages, in this turning point there were major changes in society.

hello answer is b i hope that helepd.