A.The same child at different time and different locations.
B.Different children at the same time and the same location.
C.The same child at the same time and the same location.
D.Different children at different time and different locations.
A.Make a presentation after handing in the paper.
B.Study the notes and find out what kind of behavior is influenced by the environment.
C.Study the notes and find published theories for the presentation.
D.Write a paper directly in accordance with the observations.