True or False: Referencing data in documents creates a link by using the same field across documents.

The statement is true. Referencing data in documents in MongoDB is a common practice that allows for creating relationships between different documents. This is achieved by using a common field across those documents, often referred to as a "foreign key" in relational databases.

When you reference data, one document will include a field that contains the identifier of another document. This creates a link between the two documents, enabling you to establish a relationship, such as linking a customer record to an order record by using the customer ID in the order document.

In contrast, embedded documents are stored directly within the parent document, which is useful for maintaining close relationships and ensuring that related data remains together. However, the concept of referencing remains unchanged: it relies on using consistent identifier fields across separate documents to maintain that connection.

The options that suggest conditional scenarios, like document size or only for embedded documents, do not accurately represent the foundational principle of data referencing in MongoDB. The method of using the same field to link documents is the consistent and straightforward way to achieve data referencing across any kind of documents.