Which of the following is true for empirical evaluation in general?
(A) It's important to reevaluate your data using different methods until you find a conclusion; if the first evaluation is inconclusive, you should evaluate the samedata again in a different way.
(B) Empirical evaluations are expensive, so it's important to capture and test as many variables as possible to make the most of your evaluation.
(C) Random assignment can help address many lurking variables that would otherwise arise with other forms of assignment to treatments.
(D) Within-subjects designs let us gather at least twice as much data by exposing each participant to multiple treatments.
(E) To avoid ordering effects, we should use random assignment to treatment orders when using a between-subjects experiment structure.