_________ is a behavioral method used in the treatment of substance abuse problems such as smoking and

The process through which thoughts and actions become routine is ______

Fill in the blank with correct word

You have noticed that your 84-year-old great-grandmother has a much smaller set of friends than she used to have. You know that the same individuals who she used to be friends with are still living in the same neighborhood. According to Cartensen, why is your grandmother not interacting with some of the people for whom she was a friend? Older adults tend to ________.

a. withdraw from friendships that are not rewarding b. become more reclusive c. not care about friends any longer d. become increasingly nervous around other old people