Cataloguing Standards

Step 1: Define MARC. The question is asking for the function or definition of Machine-Readable Cataloging (MARC). MARC is a standard for the representation and communication of bibliographic and related information in machine-readable form.

Step 2: Analyze the core purpose. The primary purpose of MARC is to provide a standardized format so that computers can read, interpret, and exchange cataloging information. It structures data about a library item (like author, title, publication date, subject headings) into a consistent format. Therefore, it is a method for the Representation of Bibliographic Information.

Step 3: Evaluate the other options. The other options are incorrect. While MARC data can be transmitted over the internet (B), that is not its definition. Options (C) and (D) are entirely unrelated to the function of MARC.