The best summary of glycolysis from the provided options is:
anaerobic; 6-carbon glucose forms two 3-carbon pyruvates; forms a net total of 2 ATP
Glycolysis is an anaerobic process (does not require oxygen) that breaks down one molecule of glucose (a 6-carbon sugar) into two molecules of pyruvate (each containing 3 carbons), producing a net gain of 2 ATP in the process.