Which of the Following Characterizes Phase One of Bowlby's Model

Which of the following characterizes phase one of Bowlby's model of attachment?

A) Infants instinctively direct their attachment to human figures.
B) Children become aware of others' feelings, goals, and plans, and begin to take these into account in forming their own actions.
C) Attachment becomes focused on one figure, usually the primary caregiver.
D) Infants start to lose attachment to their primary caregivers.