It’s (D) because it’s the only one that makes sense when you read it out loud
The following are context clues phrases in the passage examples and syntax
Fourth Estate is the term that is sometimes used to refer
the media or the press.
To add, the Fourth Estate (or fourth power)
is a segment of society that wields an indirect but significant influence on
society even though it is not a formally recognized part of the political
system.
This writing technique is known as the flashback. It makes the writers back time from the present point of his/ her novel. This writing technique is usually used to remember the past events that occurred in the history. This technique is also used to reveal some essential truth about the main character in the past.
