Which miracle performed by Elisha is most debated regarding its historicity due to its seemingly fantastical nature, often interpreted symbolically?

A Causing an axe head to float (2 Kings 6:6) B Multiplying the widow's oil (2 Kings 4:1-7) C Raising the Shunammite woman's son (2 Kings 4:32-37) D Cursing the youths who mocked him, resulting in their mauling by bears (2 Kings 2:23-25)