Answer:
A
Step-by-step explanation:
Glycolysis is the first set of reactions in the breakdown of glucose.
During glycolysis, there are many enzymes and reactions that take place, in order to produce 2 molecules of ATP, and pyruvate.
Pyruvate then goes on to be part of another set of reactions which release more energy.
Glycolysis is the reaction that takes place in our bodies, and we do not produce our own oxygen, and hence option B is incorrect.
Option C is considered incorrect because although water and carbon dioxide are formed as products, glycolysis does not store energy in those molecules.
Option D is also wrong, because glycolysis does not recycle glucose, it breaks it down to release energy.