Bernard wants to find out how the behavior of elephants in a zoo differs from the behavior of elephants in the wild.
What sort of study would be best for Bernard to do?
A.
an experimental study with only one independent variable
B.
an experimental study with two independent variables
C.
an observational study in a zoo and in the wild
D.
an observational study in a zoo only

Respuesta :

Otras preguntas

ACCESS MORE
EDU ACCESS
Universidad de Mexico