According to Mary Ainsworth, How Will a Securely Attached Child

According to Mary Ainsworth, how will a securely attached child behave in the strange-situation test?

A) He or she will continue to show signs of distress when the mother returns after a brief absence.
B) He or she will play and explore new settings when the parent is present.
C) He or she will not interact with the stranger.
D) He or she will tend to be clingy and whiny when the mother returns after a brief absence.