What happened to the cotton club in the 1920s

If a person has a right that is started in the constitution that

The second continental congress: a. made provisions for a continental army with george washington as commander-in-chief b. adopted a “declaration of causes of necessity of taking up arms” c. endorsed the olive branch petition d. all of the above

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?