The correct statement about the synthesis of erythritol (C(CH₂OH)₄) used in the preparation of PETN is:
(A) The synthesis requires three aldol condensation and one Cannizzaro reaction
(B) Alpha hydrogens of ethanol and methanol are involved in the reaction
(C) The synthesis requires two aldol condensation and two Cannizzaro reaction
(D) The synthesis requires four aldol condensation between methanol and ethanol