The incident which inspired King Josiah to undertake a reform was the

In Christian Religious Knowledge, King Josiah is an important figure who was inspired to reform his kingdom. The question asks what incident inspired King Josiah to undertake this reform. The options are A) prophecy of Huldah the prophetess, B) sacrifices of Hilkiah the priest, C) discovery of the book of the law (which is the correct answer), and D) preparation of the Passover.

The correct answer is option C, which is the discovery of the book of the law. This refers to the finding of a scroll containing the laws of Moses in the temple during Josiah's reign. This discovery led to a revival of religious practices in Judah.

Josiah was inspired to reform his kingdom by the teachings in the book of the law. He ordered the destruction of false gods and idols, and he reinstated the Passover festival. Josiah's reforms were an attempt to bring the people of Judah back to the worship of the one true God.

It is important to note that the other options, A) prophecy of Huldah the prophetess, B) sacrifices of Hilkiah the priest, and D) preparation of the Passover, were all significant events in Josiah's reign, but the discovery of the book of the law was the main inspiration for his reforms.

To learn more about King Josiah and the reforms he implemented, please see the relevant sections of the recommended textbooks.