Choose the best sentence that has the same meaning as the root.

Unless we protect the environment, our life will be badly affected.

• A. 
  If we protect the environment, our life will be badly affected.
• B. 
  If we don’t protect the environment, our life will be badly affected.
• C. 
  If we don’t protect the environment, our life won’t be badly affected. 
• D. 
  If our life is badly affected, we will protect the environment.