A portion of the polymer polystyrene is shown. H H H H -ċ-ċ-Ċ-Ċ-ċ-Ć-Ċ-Ć-ċ-Ċ- Η Η Η Η Η Η Η Η Η Η Identify the repeating unit of polystyrene. Он H. C=C H H H HHH H H H

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A:

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A: a)

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A:

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A: