The Burning Pain We Feel in Our Muscles During Strenuous

The burning pain we feel in our muscles during strenuous exercise is a result of

A) the buildup of lactic acid during fermentation.
B) signals sent to the nervous system by O₂-starved cells.
C) the accumulation of pyruvate in the absence of oxidative phosphorylation.
D) the lack of ATP needed to regulate the pain receptors in our muscle cells.