Answer:Smallpox and vaccination are intimately connected. Edward Jenner developed the first vaccine to prevent smallpox infections, and this success led to the global eradication of smallpox and the development of many more life-saving vaccines.
Explanation:
a is the answer (at least that's what i believe)
<span>Because, of the mixture of ethnic groups in the land. Control of land and ethnic groups moved back and forth between these empires.</span>
C
It can’t be A because, obvious.
It can’t be B because he’s advocating for third parties.
It won’t be D because he says nothing about the constitution nor banning political parties.
C
