Answer:
Spartacus, Stamen Grigorov, Ralitsa Vassileva, John Atanasoff, Sylvie Vartan.
Explanation:
No group in what? like government? can you be more specific?
I would say D the Billingsella Corrugata, it IS in the oldest recorded time line, so by theory, it's the oldest (Don't quote me on that, I'm not %100)
did you ever find out the answer