25. Cancer cells often exhibit an increased rate of glycolysis, even in the presence of oxygen (a phenomenon known as the Warburg effect). How does this enhanced glycolysis contribute to the ability of cancer cells to thrive? (A) It produces metabolic intermediates that are used for the biosynthesis of macromolecules that are required for cell growth and proliferation. (B) It generates excess oxygen, counteracting the hypoxic conditions often found in tumors. (C) It directly provides the large amounts of ATP required for rapid cell division. (D) It prevents the accumulation of reactive oxygen species (ROS), protecting cancer cells from oxidative damage. (E) It increases the efficiency of oxidative phosphorylation in the mitochondria.