In Bowlby's "Clear-Cut" Attachment Phase

In Bowlby's "clear-cut" attachment phase,

A) grasping, smiling, and gazing into the adult's eyes help bring babies into close human contact.
B) babies display separation anxiety.
C) infants develop a sense of trust with their caregiver, but do not protest upon separation.
D) babies do not mind being left with an unfamiliar adult.