What was one of the most consequential mistakes the Robert E. Lee made at Gettysburg?
A:Joining forces with other officers
B:Advancing to Cemetery Hill
C:Ordering Pickett's Charge
D:Retreating after day 2

Answer :

Answer:

i believe it is b, since in making that advance it costed them to become vulnerable during the war which was one of there biggest mistakes

Explanation:

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