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WILL MARK BRAINLIEST


Hypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.


What is the control to test this hypothesis?


A: Elodea plants in the dark

B: Elodea plants in the light

C: Elodea plants with snails

D: Elodea plants without snails

E: bromthymol blue without plants or snails

ONLY ONE ANSWER CAN BE CHOSE