The delivered speech was significant because its made the Union forces turned back a Confederate invasion of the North.
<h3>What is the Gettysburg Address?</h3>
The Gettysburg Address is a speech delivered by President Abraham Lincoln at the dedication of the Soldiers' National Cemetery during American Civil War.
The purpose of the delivered speech was to bring the country together (most especially the North) because they are divided by differing views of war.
So, the delivered speech was so significant because its made the Union forces turned back a Confederate invasion of the North.
Therefore, the Option B is correct.
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