The components of a Decision Support System (DSS) include:

A Decision Support System (DSS) is designed to aid in decision-making processes by providing relevant data, tools, and a user-friendly interface. The components that make up a DSS typically include a database to store and manage information, a software system that processes and analyzes that data, and a user interface that allows decision-makers to interact with the system effectively.

The database is essential as it contains the data necessary for analysis, whether that's historical data, real-time information, or data from various external sources. The software system is responsible for the analytical processing—performing calculations, running simulations, and generating reports. Finally, a well-designed user interface is crucial as it provides an accessible platform for users to input their queries, visualize results, and make informed decisions based on the insights provided.

While other choices may mention useful tools and features, they do not holistically encompass the core components of a DSS as effectively as the chosen answer does. Components mentioned in A, B, and C may refer to specific functionalities or instruments used within a DSS but do not clarify the foundational structure and interaction that enables decision support.