Based on the information in the passage, why is the connection between pumping stations and clearwells so crucial? a if water is not processed through both a pumping station and a clearwell, it is not safe for humans to drink. b water is processed through a clearwell first to add important chemicals that clean the water in the pumping station. c if water is not processed through both a pumping station and a clearwell, the particles will not settle in the basin properly. d water is processed through a pumping station first to extract oxygen which will react badly inside the clearwell.