8. your buddy mark has stopped hanging out with you and your friends. you have heard that he has been acting very sad and quiet, which is not like him at all. what other risk factors would increase your concern that mark could be depressed and possibly thinking about suicide? (1 poin a. mark failed his first test in social studies. b. mark has been bullied at school for years. c. mark goes to church with his family once a month. d. mark volunteers to feed the homeless.