Ralph Ripley’s most popular song Under the Pine Tree is one of my favorites.

Ralph Ripley’s most popular song Under the Pine Tree is one of my favorites.
A、Ralph Ripley’s most popular song "Under the Pine Tree" is one of my favorites. (No commas)
B、Ralph Ripley’s most popular song, "Under the Pine Tree" is one of my favorites.
C、Ralph Ripley’s most popular song "Under the Pine Tree," is one of my favorites.
D、Ralph Ripley’s most popular song, "Under the Pine Tree," is one of my favorites.
正确答案：Ralph Ripley’s most popular song, "Under the Pine Tree," is one of my favorites.