<span>a.establishing schools</span>
He extended it up to 600 miles
Hope it helps!
A pedigree allows for simple organization of a family tree and any possible disease that may be passed on. It is better than a written passage because it is visual; people can see the pattern of inheritance.
Pedigrees are organized like a family trees. The first ancestors are at the top, and their progeny are connected below them. As a result, this makes the pattern easy to follow.
<span>d. all of the above.</span>