A child is considered ________ if they become upset when left in a strange situation by their parents and ________ if they do not appear stressed at all.

A) secure; avoidant
B) avoidant; anxious-avoidant
C) avoidant; secure
D) anxious-ambivalent; avoidant

A child is considered anxious-ambivalent if they become very upset when their parent leaves them in a strange situation, indicating a strong attachment and anxiety about separation. They are considered avoidant if they do not appear stressed when left in a strange situation, indicating a tendency to avoid seeking comfort from their parents.