Question: Your website uses CSS Grid Layout extensively, and a visitor who navigates using the keyboard tells you that they seem to jump erratically all over the screen when navigating. What is the most likely problem?

1. The visitor's browser does not have full support for CSS Grid Layout.
2. Items have been positioned in such a way that they are in a different order to the source.
3. The browser has a keyboard navigation bug.
4. You need to add the tabindex attribute to elements.

Answer: The correct answer of the above question is Option B:Items have been positioned in such a way that they are in a different order to the source.