Which miracle performed by Elisha is most debated regarding its historicity due to its seemingly mythological nature and lack of parallel in other prophetic accounts?

A Raising the Shunammite woman's son (2 Kings 4:32-37) B Causing an axe head to float (2 Kings 6:1-7) C Cursing the youths who mocked him, resulting in their death by bears (2 Kings 2:23-25) D Purifying the water supply of Jericho (2 Kings 2:19-22)