I think it D) A glossary lists the meanings of difficult words in a text.
Explanation:
A glossary also known as a vocabulary or clavis, is an alphabetical list of terms in a particular domain of knowledge with the definitions for those terms. Traditionally, a glossary appears at the end of a book and includes terms within that book that are either newly introduced, uncommon, or specialized. While glossaries are most commonly associated with non-fiction books, in some cases, fiction novels may come with a glossary for unfamiliar terms.
D. A glossary lists the meaning of difficult text.
Explanation:
This is the actual definition of glossary, "an alphabetical list of terms or words found in or relating to a specific subject, text, or dialect, with explanations; a brief dictionary." And this definition matches closely to D.
