Question: The `.addClass()` and `.removeClass()` methods can accept functions as arguments. What does this function do?

1. It adds the first class found on the body element to the #menu element.
2. It adds all classes found on the #menu element to the body tag.
3. It replaces any classes on the #menu element with all classes from the body tag.
4. It adds all classes found on the body element to the #menu element.

Answer: The correct answer of the above question is Option D:It adds all classes found on the body element to the #menu element.