Some Reaction Steps in the Glycolytic Pathway Have Positive Standard

Some reaction steps in the glycolytic pathway have positive standard free energy changes.Which statements apply?

A) The standard free energy for these steps is not the same as the actual free energy change in cells.The actual free energy change must be negative or zero.
B) The reaction steps with positive standard free energy changes are likely to be regulatory steps for the pathway.
C) The steps with a positive standard free energy change are the fastest steps in the pathway.
D) The steps with a positive standard free energy change must be coupled to an ATP →ADP conversion.