The correct answer is D. The repetition focuses on the traits of the age being described.
Step-by-step explanation:
In the excerpt presented from "A Tale of Two Cities" the author uses the repetition of the pronoun "it" along with the past "was" to include different traits about the age that is described this includes contradictory details such as "It was the best of times, it was the worst of times" or " it was the spring of hope, it was the winter of despair". This repetition in the opening lines of this literary work plays an important role as they introduce the setting of the story and more importantly "make the reader focus on the traits of the age being described".