The statement that would not be considered common knowledge is:
A. Pete Seeger did not think “This Land is Your Land” was a great song.
This statement refers to a specific opinion held by Pete Seeger about Woody Guthrie's song, which is not something that everyone would know without being familiar with the context of the passage or the history of these individuals. The other statements are generally known facts about Woody Guthrie and Pete Seeger.