What is an index?

a. an alphabetical list of all topics covered in a book and the pages on which they can be found

b. a statement of the author’s purpose in writing the book, which may include suggestions for using the book

c. an alphabetical list of all the specialized words and terms used in the book and their definitions

d. a page at the front of a book that lists units and chapters with their page numbers

A. An alphabetical list of all topics covered in a book and the pages on which they can be found.

Explanation:

An index often regarded as a reference point for the readers as it includes all the bibliographical information i.e. a list of all the contents(headings)  organized in alphabetical order along with a description of pages(pointers) that assists them to refer to certain chapter or page more conveniently. It allows them to access information on a specific topic or subject promptly and easily. It is used nowadays in specific formats like books, websites, databases, etc. Thus, it is an important element especially in regard to the textual information.

i love cake

and don't hate

i know i'm fat

but what's wrong with that

i cant rap

but im sure ya know that

its just for fun

so quit hatin' son

~courtney