The correct answer is A. Chlorofluorocarbons (CFCs).
CFCs are a group of chemicals that were once widely used in refrigerators, air conditioners, and aerosol cans. They are very stable and do not break down easily in the atmosphere. However, when they reach the stratosphere, they are broken down by ultraviolet radiation and release chlorine atoms. These chlorine atoms react with ozone molecules, destroying them.
Polyphenols are a group of chemicals that are found in many plants. They have antioxidant properties and can protect cells from damage. However, they are not known to cause ozone depletion.
Dioxins are a group of chemicals that are formed as a byproduct of industrial processes. They are highly toxic and can cause cancer and other health problems. However, they are not known to cause ozone depletion.
Rayon is a type of fabric that is made from cellulose. It is not known to cause ozone depletion.
In conclusion, the major cause of ozone depletion is CFCs. CFCs are a group of chemicals that were once widely used in refrigerators, air conditioners, and aerosol cans. They are very stable and do not break down easily in the atmosphere. However, when they reach the stratosphere, they are broken down by ultraviolet radiation and release chlorine atoms. These chlorine atoms react with ozone molecules, destroying them.