Dihydroxyacetone phosphate is:

A) an aldotriose.
B) an enantiomer of glyceraldehyde-3-phosphate.
C) derived from C4-C6 of fructose-1,6-bisphosphate.
D) isomerized to glyceraldehyde-3-phosphate by triose phosphate isomerase (TPI).
E) the least abundant component of the TPI reaction at equilibrium.