The correct statement about the synthesis of erythritol `(C(CH_(2)OH)_(4))` used in the preparation of PETN is
A. The synthesis requires two aldol condensation and two cannizzaro reactions
B. Alpha hydrogens of ethanol and methanol are involved in this reaction
C. The synthesis requires four aldol condensations between methanol and ethanol
D. The synthesis requires aldol condensation and one cannizzaro reaction.
