A. A text that changes the belief or fate of a society
A seminal work is a work that has an impact on later works. It changes the belief or fate of a society. It is definitely not mostly forgotten by a society. The seminal work may or may not be entertaining to a society. The Declaration of Independence is considered a seminal work.
Answer:
In order to support his argument that the works of Shakespeare represent the world and ourselves, Mack offers proof that Macbeth represents himself as excessively optimistic and obsessed with social status.