What is programmatic access in the context of databases?

Programmatic access in the context of databases refers to the use of programming constructs to interact with data stored in a database. This method typically involves utilizing libraries or APIs that facilitate the connection to the database, allowing developers to write code that makes it easy to execute queries, retrieve data, and manipulate records programmatically.

Option B highlights the existence of libraries that provide default code for connecting to a database, which is a fundamental aspect of programmatic access. These libraries offer pre-built functions and methods that streamline communication with the database, enabling developers to focus on building their applications without needing to understand the underlying complexities of database connectivity.

The other options do not align with the concept of programmatic access. Writing queries manually is a more hands-on approach and does not utilize an automated or coded method. Data entry refers to the process of inputting information into a database, typically through a user interface, rather than through coded commands. Visualizing database relationships involves graphical representations of how data entities relate to one another but does not address accessing or manipulating that data programmatically.