:crazy: My problem with the answer is that everywhere you read about B-tree, that I have found, does not use the term balanced. There are many articles/diagrams explaining B-Tree indexes, and numerous ones infer Binary but do not specifically say this.

The next issue I have is that if you were to google Binary Index Tree, the explanations/Diagrams are identical.

I believe that this is a great question for conversations, debates and many articles about. But based upon the chosen answer as being the correct one leads me to believe that there was interpretation on the writer's part which in this case goes against the interpretation of many others.