How did the prophet Huldah's interpretation of the Book of the Law influence King Josiah's religious reforms in Judah?

A She dismissed the book as a forgery and urged Josiah to maintain the current religious practices. B She confirmed the authenticity of the book and warned of impending judgment for Judah's idolatry, prompting Josiah to lead a national repentance and implement sweeping religious reforms. C She used the book to justify a military campaign against neighboring nations. D She encouraged Josiah to rewrite the book to better suit his political agenda.