Answer:
He is never formally trained.
Explanation:
O. Henry's short story "A Retrieved Reformation" revolves around the story of a convict Jimmy Valentine and his reformation after meeting a beautiful woman. Not only that, he became a changed man after he had to reveal his true nature to save a little girl stuck inside a bank's safe.
The narration of the short story begins with the lines <em>"In the prison shoe-shop, Jimmy Valentine was busily at work making shoes."</em> A few line salter, he was freed from the prison and went back to his former 'profession'- that of stealing. But when he met Annabel, he put on a new name and opened a shoe shop. But despite all these, he did not formally receive training in the shoe-making business. It was just something that he learned while in prison.
Thus, the correct answer is the third option.
