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.