McKenzie Is New at Observing Infant Behavior in the Strange-Situation

McKenzie is new at observing infant behavior in the strange-situation test and is uncertain how to assess baby Stephan's actions.If she guesses that he is securely attached,he most likely

A) continued to play happily when his mother left him in alone in the room.
B) was not afraid of strangers when his mother was in the room with him.
C) ignored his mother when she returned to the room after being gone.
D) was comforted by a stranger when his mother was out of the room.