Which one of the following is a description of a controlled experiment?
A) Group I, 50 mice provided with food (mouse pellets) and a water bottle Group II, 25 mice provide with food (corn) and provided with water in a tray.
B) Group I, 25 mice provided with food (mouse pellets) and a water bottle Group II, 50 mice but only half the mice are provide with food (mouse pellets) and a water bottle.
C) Group A, 50 mice provided with food (mouse pellets) and a water bottle Group B, 50 mice provided with food (corn) and provided with water in a tray.
D) Group A, 50 mice provided with food (mouse pellets) and a water bottle Group B, 50 mice provided with food (corn) and water in a water bottle.
Correct Answer:
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