Which of the following is the BEST example of one-tier service architecture?

An online banking website is a multi-tier application, involving a client (browser), web server, application server, and database server.

A cloud management system is inherently multi-tier, dealing with distributed resources, APIs, and complex backend services.

A database management system (DBMS) itself is a component, often part of a multi-tier architecture, managing data for other applications, rather than being a self-contained one-tier application.

A mobile photography application typically runs entirely on the user's mobile device, encompassing the user interface (presentation), the image processing and editing logic, and local storage for photos (data). All these functional tiers are consolidated within a single environment, characteristic of one-tier architecture.