Suppose You Were Examining Whether a Synthetic Chemical Reduced the Growth

Multiple Choice

Suppose you were examining whether a synthetic chemical reduced the growth rate of mice. Which action would you take to ensure a controlled experiment?

A) Allow some mice to roam between cages, while having others remained confined to a single cage.
B) Exclude one group of mice from exposure to the chemical, but otherwise treat all of the mice in the same manner.
C) Compare a natural population of mice exposed to the chemical to a natural population not exposed to the chemical.
D) Use computer programs to analyze the results from all treatment groups.