He said that when he was a boy he could stay up as long as he liked.

• A. He said, When I had been a boy I could stay up as long as I liked.
• B. He told, When I was a boy I could stay up as long as I liked.
• C. He said, When I was a boy I could stay up as long as I liked.
• D. He said, When I am a boy I can stay up as long as I like.