Abraham Lincoln was elected president
Answer:
The most common positive affect was the intoduction to new crops the most common negative affect was the exchanges of diseases from old to new world
Explanation:
It is b ! Have a nice day
Vietnam war or other would call the indo china war, but in vietnam, this war is called resistance war against america, that happened in vietnam, laos and in cambodia. this war is also called as the vietnam conflict. but not just that, there are may names that they have given in this war