Which of the following characteristics of experiments are not also characteristics of surveys? medal plus fan

Question

Which of the following characteristics of experiments are not also characteristics of surveys?  medal plus fan

anonymous · Answer

A.	Two or more treatments are compared in the study (possibly including "no treatment").
 		B.	Data are gathered during the course of the study.
 		C.	One or more treatment groups and a control group are included in the study.
 		D.	Replication with other groups of subjects can improve the reliability of the study.
 		E.	The results of the study are analyzed statistically.

anonymous · Answer

a

anonymous · Answer

there should be more than one i think

anonymous · Answer

one of what ?

anonymous · Answer

I know it is A, but im not sure of the others :(

anonymous · Answer