Ainsworth's Experiment of Having a Researcher Assess an Infant's Exploration

Ainsworth's experiment of having a researcher assess an infant's exploration of a room, use of the caregiver as a secure base, reactions to the caregiver separation, reactions to the entry of a stranger, the ability to be soothed by the stranger, and reactions to the reunion with the caregiver is known as the

A) attachment formation study.
B) stranger test.
C) novel attachment situation.
D) Ainsworth attachment study.
E) strange situation.