Choose the sentence (a, b, c, or d) which is closest meaning to the sentence above.

If we don't protect wildlife now, there will be nothing left for future generation.

• A. 
  Wildlife is being protected now in case there will be nothing left future generations.
• B. 
  There will be nothing left for the future generations unless we protect wildlife.
• C. 
  Only if we protect wildlife, there will be nothing left for the future generations.
• D. 
  It's important to protect wildlife now or there will be nothing left for the  future generations.