D. Personally, I am a christian but this is just a project and I have had to do aboriginal projects so I know this. You're welcome!
The answer is entomology (choice B). Root words tell you the simplest word to find the meaning of, affixes are the additions to the root word that have a few typical meanings that allow you to adjust your definition. Etymology is about the origin of words, whether it is related to a place, or a person, or in a foreign language. However, entomology is the study of insects and does not help one understand word meanings.
