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Draw all of the stereoisomers that result when (E)-but-2-ene is hydrogenated with D2 over a metal catalyst.

The protium isotope of hydrogen (H) is understood and should not be drawn, but the HEAVIER deuterium isotope of hydrogen (D) is not understood and must be shown. Use the X-tool to input D. When a chiral carbon contains a hydrogen, you should not show the hydrogen, but you must use either a wedge or dashed bond and 2 sticks to establish stereochemistry.

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