Beyond his role as a judge, what unique act of devotion did Jephthah perform that carries significant theological weight and has been subject to much debate?

A He led Israel in a campaign of total destruction against the Ammonites, dedicating all spoils to God. B He publicly confessed his sins and offered sacrifices for the entire nation of Israel annually. C He made a vow to sacrifice whoever first came out of his house to meet him if he won a battle, and tragically, it was his daughter. D He built a temple to commemorate his victories and established a new priestly order.