Which sentence would be inappropriate in an informational piece of writing with a formal tone?

A: People find Shakespeare's Pericles, Prince of Tyre boring and annoying because it's possible that he didn't even write the entire play.
B: Thirty-nine plays, a combination of comedies, histories, and tragedies, are attributed to William Shakespeare.
C: William Shakespeare, a poet, and playwright have generally deemed the greatest writer in the history of the English language.
D: Scholars speculate that Hamlet may have been informed by the relationship between Shakespeare and his son Hamnet, who died at eleven years of age.