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Answer - A - Aerobic refers to activities that require oxygen. Both carbohydrates and fat can be metabolized aerobically during the process of oxidation. The glycolysis process that occurs within the oxidative system is aerobic, while the glycolysis process that occurs within the glycolysis system can be either an aerobic or an anaerobic process. In other words, the glycolysis process that occurs within the glycolysis system can occur either with or without oxygen.