Bowlby's Initial Ideas About Attachment Were Influenced All of the Following

Multiple Choice

Bowlby's initial ideas about attachment were influenced all of the following sources except

A) the mystery of the high death rates of infants staying in hospitals and orphanages.
B) ethological research conducted by Lorenz and colleagues on imprinting in birds.
C) research with primates by Harry Harlow on "mother love."
D) Ainsworth and colleagues' assessment of quality of attachment in young children.