While often overlooked, what critical role did Huldah the prophetess play in the religious reform under King Josiah (2 Kings 22:14-20)?

A She personally led the construction of the new temple. B She authenticated the Book of the Law found in the temple, giving it divine authority and prompting Josiah's reforms. C She served as Josiah's military advisor, guiding him in battles against neighboring kingdoms. D She was responsible for collecting taxes to fund the temple restoration project.