Answer;
C. the plant is producing oxygen
Explanation;
-Scientific inference is the conclusion of a hypothetical-deductive argument after the experiment is conducted. Inference is the process used in forming a hypothesis and it combines something you observe with your previous knowledge.
-An inference is an idea or conclusion that's drawn from evidence and reasoning. An inference is an educated guess. We learn about some things by experiencing them first-hand, but we gain other knowledge by inference.