Young Pemba Is Being Observed as He Plays in a Room

Young Pemba is being observed as he plays in a room with his mother.Pemba frequently goes to the toys in the room,but occasionally looks back at his mother to make sure she is there.After a quick smile is exchanged between mother and child,Pemba goes back to the task of building with the toys.When Pemba's mother leaves the room,he becomes moderately upset,but is easily soothed when she returns.Which type of attachment does Pemba seem to have with his mother?

A) Loving
B) Secure
C) Interdependent
D) Developmental