"Enter Sandman" is a song by American heavy metal band Metallica. It was released as the first single from their eponymous fifth album, "Metallica" in 1991. The music was written by Kirk Hammett, James Hetfield and Lars Ulrich. Vocalist and rhythm guitarist Hetfield wrote the lyrics, which deal with the concept of a child's nightmares.

Choose your answer: based on the paragraph above can we conclude that ""Enter Sandman" is Metallica's most popular song. "?

Available choices: I. Yes. II. It's impossible to say. III. No.
I think the answer is
II.