Which of the Following Is True About the Common Practice

Which of the following is true about the common practice of purifying water by adding chlorine to it?

A) This treatment process ensures the removal of all pesticide residues from drinking water.
B) This treatment creates chemicals in drinking water that may cause cancer and birth defects.
C) In the U.S., this process is only used for recreational water (e.g., swimming pools) , not for drinking water.
D) The addition of chlorine to drinking water has health benefits such as strengthening bones and tooth enamel.