Answer:
c. files
Explanation:
A database is an organized collection of data, which is generally stored and accessed electronically from a computer system.
Some of the most popular database software programs include:
IBM DB2, Microsoft Access, Microsoft Excel, Microsoft SQL Server, MySQL, Oracle RDBMS, SAP Sybase ASE and Teradata.
In very basic terms, a database is a system for storing and taking care of any kind of data. Data here could be text, audio file, video, etc.
A very basic example of a database is your computer hard drive where you have different files sorted by you and stored in various locations.