Four mothers whose infants are in a play group walk out of the room for a few minutes and then come back in. Which one of their infants displays an insecure-resistant pattern of attachment?
a. Greta, who didn't seem to acknowledge her mother's absence or return.
b. Sammy, who was upset when his mother left but was easily comforted by the attendant.
c. Billy, who seeks contact with his mother, but shortly afterward resumes play.
d. Tracy, who would not be comforted in her mother's absence and is now angrily hitting at her mother with her tiny fist.