i need some help figuring this one out

In an experimental design, the variable over which the researcher has control, and which is different for the treatment and control groups, is called the _____.

Question

i need some help figuring this one out 

In an experimental design, the variable over which the researcher has control, and which is different for the treatment and control groups, is called the _____.

anonymous · Answer

here are my options 

 		A.	explanatory variable
 		B.	dependent variable
 		C.	response variable
 		D.	lurking variable
 		E.	random variable

anonymous · Answer

The response variable is the outcome variable on which comparisons are made. 

The explanatory variable defines the groups to be compared with respect to values on the response variable. (similar to the independent variable)