D that is because it is the information about a period, the place, and the event taht created, influenced, and formed the background to historical records
The sentence that has an incorrect shift in pronoun antecedent agreement is A) No one had noticed the pickpocket stealing their wallet.
Answer:
A monologue is a speech given by a single character in a story. In drama, it is the vocalization of a character’s thoughts; in literature, the verbalization. It is traditionally a device used in theater—a speech to be given on stage—but nowadays, its use extends to film and television
so i would put it in a way so your expressing what the monologue is and how its important.

By the 1920s, dogsleds had for quite some time been the essential methods
of movement for mail, payload and individuals in the immense wild
of Gold country. Late advances in flying machine innovation
anyway were rapidly making air travel a favored
transportation mode in remote The Frozen North and dogsledding
would before long become out of date.
– "Iditarod,"
The Frozen North Open Terrains Data Focuses
My opinion it means that it has two sides of good and great