An Experiment Is Defined As

An experiment is defined as:

A) something men and/or women in white coats do.
B) manipulating an independent variable to see how it affects a dependent variable,while also controlling for the effects of additional complex variables.
C) manipulating a dependent variable to see how it affects an independent variable,while also controlling for the effects of additional complex variables.
D) holding all variables constant to observe any effects of one variable over another over time.
E) manipulating an independent variable to see how it affects a dependent variable,while also controlling for the effects of additional extraneous variables.