Two features of nonfiction books for older readers that are often omitted in nonfiction for younger readers are the:

Question

A. index and the appendix.

B. table of contents and the glossary.

C. table of contents and the index.

D. glossary and the index.

d?

Answer 1

Nonfiction for older readers?
quite often there is a glossary.

I would look for another answer.