Final answer:
The subject is Alteryx database configuration options, and the correct answer is workflow configuration file.
Step-by-step explanation:
The subject of this question is Alteryx, a database platform used for data extraction and workflow configuration.
The correct option is C. Workflow configuration file. This refers to the configuration file in Alteryx that contains settings and parameters to customize and control the behavior of a workflow.
The other options mentioned in the question are not directly related to Alteryx. Data extraction format refers to how data is extracted and stored, file format for macros refers to the specific file format used for macros, and database schema file refers to a file that defines the structure of a database.