Answer:
The victory at the battle of Antietam gave Abraham Lincoln a platform to issue the Proclamation from a position of strength
Explanation:
This changed the character of the Civil War and prevented the European powers from intervening on behave of their trading partners of the southern Confederacy
WWI tanks were used to lead infantry advances across no mans land (option a ). It was a welcome development, as it was hoped it would help ending the long and casualties provoking trenches type of war.
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option is that "fair and free elections are held" since in totalitarian states there are very rarely elections at all.</span>