Answer:
The correct answer is C
Step-by-step explanation:
The model shows a factory creating excess levels of C*O_{2}. This would support Scientist A's claim that the factory is responsible for the excess C*O_{2} in the atmosphere. The model illustrates that the C*O_{2} is not lost throughout the system, but is released directly into the atmosphere, and not cycled back into the ecosystem. This would indicate that the factory is the source of the excess C*O_{2} in the atmosphere.