ANSWERS: 1
  • Well, you can rule out B and D, right? Glucose has carbon in it, so you need that. That leaves: A) Oxygen and Carbon Dioxide - or - C) Carbon Dioxide and water Well, Glucose also has Hydrogen in it, in the form of Hydroxyl groups. Therefore A cannot be the answer, because neither Carbon Dioxide, nor pure O (or O2) have Hydrogen. However, water does have Hydrogen (H2O), so C must be the right answer.

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