Which of the Following Is True of Tableau Public

Which of the following is true of Tableau Public?

A) Tableau Public is totally separate from Excel,although Excel data can be imported into Tableau Public.
B) You can publish your own Tableau Public visualizations to the Web,but only if you're willing to pay for an account.
C) The data for a Tableau Public visualization must be based on a single source table of data.
D) Tableau Public can be used as a standalone software program,independently of Excel,or it can be used as an Excel add-in.