Answer: d. Americans are less likely to identify themselves as group members today than in the past.
Explanation: In recent American history, social groups have shrunk, such that Americans identify themselves as individuals and are less likely to identify themselves as being a member of a group. This is due to the individualistic culture in America. For example, when an American is asked to describe who he/she is, they might mention their profession or their personality rather than mention being a member of a group.
Recent studies show that between 1985 and 2004, Americans have 33% less confidantes with whom they believe they can share their private thoughts.