Which choice completes the text so that it conforms to the convention…

Source Texts

Text

While conducting an interview for her book Latina Authors and Their Muses, editor Mayra Calvani asked Margo Candela, author of the young adult novel The Brenda Diaries, what ____ Candela's response was The Phantom Tollbooth by Norton Juster.

Which choice completes the text so that it conforms to the conventions of Standard English?

was her favorite book!

was her favorite book?

her favorite book was.

her favorite book was?