Which of the following describes a Decision Tree in expert systems?

A Decision Tree in expert systems is represented as a flowchart that assists users in navigating through various choices to arrive at a specific conclusion. This structure utilizes nodes and branches to represent decisions and their potential consequences, effectively guiding the user step by step. Each decision point represents a question, and the branches represent the possible answers leading to further decisions or final outcomes. This visual approach simplifies complex decision-making processes, making it easier for users to comprehend the various options and potential results.

The other options describe functions that do not align with the role and functionality of a Decision Tree. A database for storing transaction data refers to a system for managing data rather than a decision-making aid. A method of data integrity verification pertains to ensuring that data remains accurate and consistent, which differs from the operational context of a Decision Tree. An analytical processing tool for statistical research typically involves data analysis rather than guiding decision-making through a structured format. Therefore, the defining characteristic of a Decision Tree as a flowchart for guiding users through choices is what makes this the correct response.