Lactic Acid Is Turned Back into Pyruvate in the Liver

Multiple Choice

Lactic acid is turned back into pyruvate in the liver. Which statement best describes the body's purpose in making lactic acid from pyruvate in the first place?

A) To cause "the burn" during strenuous exercise.
B) To raise the pH of the immediate environment.
C) To produce NAD+ for use in glycolysis.
D) To produce FADH₂ for use in glycolysis.
E) To regenerate ADP.