The sediments that make up the Ganges river delta in India are often toxic because they
A. Are highly acidic due to acid rain
B. Run through toxic soils
C. Dissolve naturally-occurring sulfur dioxide
D. Originate in coastal industrial areas
E. Have concentrations of naturally occurring arsenic
Answer: E
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The cynodonts were the direct ancestors of early mammals. Indicate whether the statement is true or false
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