Which of the Following Is True of Energy Metabolism by Cancer

Which of the following is true of energy metabolism by cancer cells?

A) They usually generate ATP through the Krebs cycle.
B) They are more efficient at energy metabolism than normal cells and generate 36 molecules of ATP for every glucose molecule metabolized.
C) They generate energy through glycolysis only when cells are experiencing hypoxia.
D) They import much higher levels of glucose in comparison with normal cells.
E) None of the above.