The limb is a self$-$differentiating system. This means that:

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If the imb disk is removed completely, a new limb will form in its place.

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If the limb disk is removed, reversed, and put back in place, a limb will form, but it now be reversed.

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Once a limb disk is formed, no other cells or information are necessary to create that limb$.$

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A and B are correct, but not C$.$

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A$,$ B$,$ and C are correct.