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