As a result of Union and Confederate casualties during the Battle of Gettysburg, both armies could no longer wage war effectively.
Lee's army was weakened for the rest of the war.
the Confederate army decided to surrender.
the Union army decided to surrender.

It’s B) Lee’s army was weakened for the rest of the war

Explanation:

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special interest groups must step back and let the process work itself out a representative can amend it at several points in the congressional staffers must do homework and report to the floor on what they 've learned