DIRECTION: Read the sentences carefully and determine which one uses parallel structure. Write only the letter of the correct answer on the space before the number.

___1. A. Rediation pollutes the ocean, contaminates the air, and is damaging to bone cells.
B. Rediation pollutes the ocean, causes air contamination, and can damage bone cells.
C. Radiation pollutes the ocean, contaminates the air and damages bone cells.
D. Radiation pollutes the ocean, it contaminates the air, and causes damage to bone cells.​