The lime water in container C turned milky because

The lime water in container C turned milky because

A.

Carbon dioxide was produced by the plant during respiration

B.

Carbon dioxide entered through the filter pump

C.

Oxygen reacts with lime water to produce milkiness

D.

Soda lime did not remove carbon dioxide from the air

E.

The delivery tubes were not well connected

Correct answer is A

Carbon dioxide was produced by the plant during respiration.