You Are Including Both a Site Map, and a Navigation

Multiple Choice

You are including both a site map, and a navigation bar on your website. What is the rationale for doing this?

A) Navigation bars display well on large monitors, but site maps work better on mobile phones.
B) Visitors need special training to use a site map.
C) Different users prefer different types of navigation.
D) It provides a clear sense of the layout of the entire website.