The Formation of Each Pyruvate in Glycolysis Also Produces a Net

The formation of each pyruvate in glycolysis also produces a net of 2 NADH and 2 ATP.However,each metabolism of glucose produces a net of 4 NADH and 4 ATP.How is this explained?

A) Glucose is cleaved into two three carbon sugars that are metabolized into pyruvate.
B) Pyruvate can also be fermented,which decreases the energy produced.
C) Glucose is metabolized by a different,more efficient pathway than pyruvate.
D) Energy is added to glucose which increases the amount of ATP produced per glucose molecule.