From Bowlby's Work on Attachment,how Would a 4-Month-Old Infant Behave

From Bowlby's work on attachment,how would a 4-month-old infant behave if separated from its mother?

A) She would show distress when her mother leaves.
B) She would cry unceasingly when her mother leaves.
C) She would notice her mother's impending departure,signaling a better understanding of her surrounding world.
D) She would begin to accept her mother's temporary absence.