If variation exists between people, what is one reason we use a reference body to convey information?

• A. So that people have a reference for how their bodies should be structured.
• B. Using a reference body gives one reference frame, simplifying the amount of information we need to learn. 
• C. Students studying anatomy are usually young adults, so the reference body is also a young adult.
• D. Variation is usually viewed as abnormal and so studied as a part of disease.