Final answer:
Without specifying the software, the default document types in Preferences could be similar to Word, Excel, PowerPoint, PDF for office suites or HTML, XML, JSON, CSV for code editors. It is best to check the software's documentation for a definitive answer.
Step-by-step explanation:
The default document types available in the Preferences dialog box of a software are specific to each application, and without knowing the exact software in question, it's difficult to give a precise answer. However, in many cases, depending on the type of software you're referring to (for example, an office suite, a code editor, or a file conversion tool), the options might include formats like text documents, spreadsheets, presentations, and PDF files as defaults.
For example, in an office suite such as Microsoft Office, the default document types might resemble option b from your question, which are Word, Excel, PowerPoint, PDF. But in the case of a code editor or development tool, you might see defaults like HTML, XML, JSON, or CSV, which corresponds to option c.
Without the exact software name, the best approximation would be option b or c, depending on the nature of the software. It's always best to check the software's documentation or preferences dialog box to see the list of supported default document types.