In the book of Esther, why is God never explicitly mentioned, and what implications does this absence have for interpreting the narrative's message about divine providence?

A The book of Esther was originally a secular historical account that was later included in the biblical canon without any theological revisions. B The absence of God's name emphasizes the hiddenness of divine activity, suggesting that God works through seemingly coincidental events and human actions to accomplish His purposes, even when His presence is not overtly acknowledged. C The book of Esther was written during a time of religious persecution when it was dangerous to openly profess faith in God, so the author intentionally omitted God's name for security reasons. D The absence of God's name indicates that the book of Esther is a fictional story intended to entertain rather than to convey a theological message about divine providence.