Answer:
D. a troubleshooting guide, FAQs, index, or glossary.
Step-by-step explanation:
A procedural text is one that guides the reader in order to be able to perform a certain task. This type of texts include instruction manuals and cookbooks, for example. When a procedural text includes "supplementals," this refers to a document that can be used in addition to the primary text and that can complement the instructions. This includes documents such as a troubleshooting guide, FAQs, index, or glossary.