The answer would be Eukarya
When dealing with domains one must remember that it is a broader group of things, which means there are numerous kingdoms that fall under a domain. I believe in order to be part of the same domain, there must be similarities between the things.
When I took biology in college, I was taught that Eukarya's include protists, animals, eukaryotes, fungi's and plants.
Hopefully this helped and good luck. If you need me to clarify anything just let me know.