Question

In a work of nonfiction, what is an alphabetical listing of important words, phrases, and concepts and the page numbers on which they are mentioned called? . . . A.the thesaurus. . B.the glossary. . C.the table of contents. . D.the index

Answer 1

alphabetical listing of important words, phrases, and concepts and the page number that mentioned is called : D. The index
In the index, you could find many references that are often used in the book so you could grasp a better understanding

hope this helps

Answer 2

In a work of nonfiction, the alphabetical listing of important words, phrases, and concepts, and the page numbers on which they are mentioned is called D. the index.
A thesaurus is a dictionary of synonyms. A glossary is a brief dictionary. A table of contents doesn't have to be alphabetical, but by order of appearance.