Which of the following statements is true about the ozone layer?

• A
  It is harmful because ozone is dangerous to living organisms.
• B
  It is beneficial because oxidation reactions can proceed faster in the presence of ozone.
• C
  It is beneficial because ozone filters out the ultraviolet radiation from the sun.
• D
  It is harmful because ozone cuts out important solar radiation that is vital for photosynthesis.