4. Which of the following describes the connection between fairness and altruism? A. Researchers have determined that an understanding of altruism develops in children before an understan ding of fairness. B. The more upset a person becomes in the face of unfairne ss, the more likely they are to act fairly and altruistica lly themselves. C. An understanding of fairness isn't clearly connected to someone 's ability to understand altruism or act selflessly. D. An understanding of fairness and altruism