Read the following passage and answer the question that follows.
When a river begins its flow from the mountains it is clean and clear. As the river travels down wastes from homes and industries are dumped in it. Chemicals often make the water frothy and dirty. The fish die in such dirty water. Dirty polluted water causes diseases like jaundice, typhoid, dysentery and hepatitis.
Which of the following statements is correct with certainty?
AIf there were no rivers there would be no jaundice, typhoid, dysentery and hepatitis.
BThe river water on hills is much cleaner due to less human interaction.
CIf water in rivers were clean,the fish would live forever.
DNone of these