which of the following provides evidence that the need to belong is a fairly universal human tendency? a. there are areas of the brain that are more active when we are in social situations. b. the number of people we want to be around depends on the general level of situational stress we are experiencing. c. medications used to treat depression are potentiated when the sufferer engages in social activities. d. even people who are described as introverts report being happier when they are in social situations.