In Relation to the Phases in the Growth of Attachment

In relation to the phases in the growth of attachment in relationships, an infant aged three to seven months is involved in which of the following?

A) Differential proximity seeking, separation protest, clinging to attachment target(s) more than to other people.
B) Maturation of readiness for attachment through visual face recognition, person permanence, stranger wariness.
C) Generalised sociability; indiscriminate social responsiveness.
D) All of the above