Cosider the below formations of red-black tree.

• A. All the above formations are incorrect for it to be a redblack tree. then what may be the correct order?
• B. 50-black root, 18-red left subtree, 100-red right subtree
• C. 50-red root, 18-red left subtree, 100-red right subtree
• D. 50-black root, 18-black left subtree, 100-red right subtree
• E. 50-black root, 18-red left subtree, 100-black right subtree