Mercedes takes her 1-year-old son, Justice, to visit a daycare center where she plans to enroll him. Justice eagerly explores the playroom as long as Mercedes is present. When his mom leaves the room to fill out some forms, Justice becomes somewhat upset, but when Mercedes returns, he quickly calms down. This is the type of interaction you might observe between a child and a parent who:
A) Share an avoidant attachment relationship
B) Have not yet developed an attachment relationship
C) Share an insecure-ambivalent attachment relationship
D) Share a secure attachment relationship