Observational Research Is Defined as

Observational research is defined as

A) a process involving one group of subjects that receives a specific treatment and a second group of subjects that does not receive the treatment.
B) an idea generated by scientists based on their observations.
C) a stepwise process used by scientists to evaluate different observational techniques.
D) a process that involves looking at factors in two or more groups of subjects to see if there is a relationship to certain outcomes.