These are all things that people do together, processes that happen when people interact with each other, so the correct answer is C. social processes.
They can be based on their interests, but don't have to be and they can involve conflicts, but again, not necessarily.
Most economists believe that a sales tax increase affects people with low incomes.
They captured Fort Ticonderoga on May 10th, 1775. I hope that helps! :)
