Çözüldü Sentence Completion - Vocabulary (GRE Level)

When studying human history, one must be aware that the ________ between historical periods are arbitrary; certainly none of the people alive at the time were aware of a shift from one era to another.

A) judgments
B) ideologies
C) innovations
D) demarcations
E) episodes

Correct Choice: D (demarcations)

Official Explanation:
If you encountered this question on the GRE, you might not know what the best answer is. However, you might see that some of the answer choices simply don’t make sense. Choices (A), (B), and (C) don’t seem to fit the sentence at all. By eliminating these wrong answers, you’ve suddenly given yourself a great chance of choosing the correct answer just by guessing, since only (D) and (E) are left. And if you realize that (E) doesn’t make sense either, then you know the correct answer is (D).

Cracking the GRE with 4 Practice Tests, 2020 Edition: The Strategies, Practice, and Review You Need for the Score You Want, Page 57

Additional Note:
"Demarcation" means;
"the action of fixing the boundary or limits of something" or "a dividing line". (Google Dictionary)
"a line or limit that separates two things, such as types of work, groups of people or areas of land" (Oxford Advanced Learner's Dictionary)