Which of the Following Statements A), B) or C) Is

Which of the following statements a) , b) or c) is false?

A) A document database stores xe "semi-structured data"semi-structured data, such as xe "JSON (JavaScript Object Notation) "JSON or xe "XML"XML documents.
B) In document databases, you typically add indexes for specific attributes, so you can more efficiently locate and manipulate documents.
C) The most popular document database (and most popular overall NoSQL database) is Neo4j.
D) All of the above statements are true.