mary ainsworth developed the strange situation as an assessment of parent-infant attachment. she observed that securely attached infants __________.
a. Do not seem to care when the mother leaves the room and do not seek her cut when she returms
b. Cry if the mother leaves the room and welcome her back when she returns
c. Are not concerned when the mother leaves, but cry to be picked up when she returns
d. Protest loudly when the mother leaves, but resist contact with her when she returns