What are “supplementals” in a procedural text?
a. additional parts that will enhance performance
b. additional instructions for beginning or advanced users
c. a separate fee paid by users who would like more support
d. a troubleshooting guide, faqs, index, or glossary

D. a troubleshooting guide, FAQs, index, or glossary.

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.

i will try let me see what they are first

it could change in many ways and by that i mean income can go lower or higher depending on how hard you work. i hope this .