How did the arrival of Union reinforcements affect the outcome of the battle of Gettysburg? The Union was able to avoid more casualties. The Union was able to hold the line and eventually win. The Confederacy surrendered immediately. The Confederacy had to take a defensive position.

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The right answer for the question that is being asked and shown above is that: "The Confederacy surrendered immediately. " the arrival of Union reinforcements affect the outcome of the battle of Gettysburg is that The Confederacy surrendered immediately. 

How the arrival of Union reinforcements affect the outcome of the battle of Gettysburg is: The Union was able to hold the line and eventually win.

What is Union reinforcement?

After the arrival of union reinforcement  this make it possible for the union to eventually hold the line making it possible for them to win the battle.

Based on the arrival of the union reinforcement led to positive outcome of the battle of Gettysburg.

Therefore the correct option is A.

Learn more about union reinforcement here:https://brainly.com/question/25961563

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