Which of the Following Is Evidence That the Entner-Doudoroff (ED)

Which of the following is evidence that the Entner-Doudoroff (ED) route might have evolved earlier than the Embden-Meyerhoff-Parnas pathway (EMP) ?

A) ED involves a larger number of reactions and produces more energy and reducing equivalents with respect to EMP.
B) 6-phosphogluconate is dehydrated to form pyruvate and glyceraldehyde 3-phosphate, which may then reenter the EMP pathway.
C) ED involves fewer substrate-level phosphorylations and yields less energy and fewer reductants than EMP.
D) All of the above.
E) None of the above.