Nitrogen oxides released in the stratosphere cause ozone depletion due to 

• The nitrogen oxide affects both the ozone subcaste and global warming when it's released into the atmosphere. 
• The ozone reduction means that the destruction of ozone exceeds the creation of O₃. When it's present together in the stratosphere the chlorine and the ozone reply snappily to produce the chlorine oxide. 
• The ozone subcaste reduction is the reduction of the quantum of ozone in the stratosphere. 
• The chlorine tittles reply with the ozone and start a chemical cycle that destroys the good ozone in that area.

Hence, option C is the correct answer.