A becuase if its c than that would be incorrect
The definition of a glossary i found is: an alphabetical list of terms or words found in or relating to a specific subject, text, or dialect, with explanations. Based on this definition i would think the most likely answer would be B, a list of topics in a book.
D
a
c
b
d
I think this is correct. I don't know honestly.
Answer: Classification means the process of classifying or organizing something into different groups.