Hi there!
The answer you are looking for is option D. Person.
In this excerpt of “All the World’s a Stage” by William Shakespeare, “players” is a symbol for human beings. With this poem, he describes the changes in life. These lines symbolize the fact that men and women, in the course of their lives, perform different roles. "A stage" symbolizes the world, as "players" is a symbol for human beings.
Hope this helps!