Which set of the following groups represent endangered species?

• A. African Elephant, Arabian Gazelle, Spanish Lynx and Spotted-owl.
• B. Blue-whale, Grey Kangaroo, Ridley Turtle and Sparrow.
• C. Asian Elephant, Polar Bear, Nail-Tailed Wallaby and Deer.
• D. Black Lion, Brazilian Python, Grizzly-Bear and Imperial Eagle