Use the Accompanying Figure to Answer the Following Question

Use the accompanying figure to answer the following question.
-Once the contaminants have been removed from the fracking wastewater,the water can be reused for additional drilling.One problem created by using this technique to purify fracking wastewater is that ____________

A) valuable metals such as iron and silver are also removed
B) the leftover metals and radioactivity are likely to harm the workers from the hydrofracturing company who are performing their jobs
C) the water is still too contaminated to pump into nearby waterways and thus needs to be stored in lead -lined steel drums
D) people have mistaken purified fracking water as drinking water and become exposed to deadly levels of radiation and heavy metals
E) the heavy metals and radioactive radium are hazardous and must be disposed of properly