The EPA sets national air-quality standards for common air pollutants. The graph shows the change in the concentrations of these pollutants over time.

Which conclusion do the data in the graph support?

A. Concentrations of all pollutants have increased.

B. Monitoring concentrations of pollutants is too expensive.

C. Monitoring concentrations of pollutants has been ineffective.

D. Concentrations of all pollutants have decreased.

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

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carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.