Question: Procedure A calls Procedure B. Procedure B searches a tree recursively for a leaf node with particular characteristics. When procedure B reaches its base case

Procedure A calls Procedure B. Procedure B searches a tree recursively for a leaf node with particular characteristics. When procedure B reaches its base case without finding a node fitting its specified criteria, it navigates back up the tree in search of a branch it has not yet examined. This is most closely an example of:

direct recursion

indirect recursion

backtracking

dynamic programming

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