Answer:
The correct words that fill the paragraph: "During this time, the ______ is measured. When Nikki leaves Stephanie all alone in the room, ______ is measured" are:
B) Secure base; stranger anxiety.
Explanation:
The Strange Situation was a method for identifying the child attachment with the mother and a strange created by Mary Ainsworth in 1960, the situation makes the child and the mother enter to a room with toys, the child be entertained by toys and slowly a strange come closer, first to the mother and next the child, when this step occurs, the mother leaves the room leaving the baby with the strange, at this moment, the researcher can visualize the reaction of the child and his/her possible anxiety.