The "Commons" Hardin Talks About in "The Tragedy of the Commons

The "commons" Hardin talks about in "The Tragedy of the Commons" is

A) the student union in his university, where all students congregate but there is little interaction across racial and ethnic lines, hence the "tragedy".
B) the many public executions and lynchings that took place in town squares during the era of Jim Crow (between the Civil War and the modern civil rights movement) .
C) almost anything that can be ruined by individuals pursuing their own self interest, heedless of the costs this has on the things we all share or have "in common".
D) the land available to everyone in pre-Industrial England where wood could be gathered and animals could be grazed-land that was taken away by rich and powerful elites, hence the "tragedy".