Beyond its literal meaning as a place of judgment and torment, what theological concept does Gehenna (Valley of Hinnom) most significantly represent in the New Testament?

A The temporary separation from God experienced by believers during times of trial. B The ultimate and irreversible consequence of rejecting God's grace and choosing a life apart from Him. C A period of purification and cleansing before entering eternal life. D The physical realm where demons and fallen angels reside.