Holding factors such as temperature, lighting, and seating arrangement constant during experimental testing supports which of the following characteristics of scientific research?

Incorporation makes the protections from the Bill of Rights applicable to the states through which of the following amendments?

a. Fourth b. Fifth c. Sixth d. Fourteenth

Opinion polls regularly show that most Americans believe ________

A. taxes are higher in other industrialized nations B. all taxation policies are fair and equitable C. taxes are too low D. taxes are too high