Katrice is 86 years old. She has never been married, has no children, and lives alone. She has only one or two friends whom she rarely sees, and as she thinks back over her life she realizes that she never did most of the things she wanted to do. She now is full of regret and feels that she has wasted her life. According to Erikson, Katrice is most likely experiencing the psychosocial crisis of:

a. stagnation. b. despair. c. isolation. d. guilt.