What is missing in this logic of finding a path in the tree for a given sum (i.e checking whether there will be a path from roots to leaf nodes with given sum)?

• A. Code for having recursive calls to either only left tree or right trees or to both subtrees depending on their existence
• B. Code for having recursive calls to either only left tree or right trees
• C. Code for having recursive calls to either only left tree
• D. Code for having recursive calls to either only right trees