When Do Muscle Fibers Produce Lactate

Multiple Choice

When do muscle fibers produce lactate?

A) Muscle fibers produce lactate when metabolizing amino acids.
B) Muscle fibers produce lactate when metabolizing fatty acids.
C) Muscle fibers produce lactate when ATP is abundant.
D) Muscle fibers produce lactate when there is a lack of oxygen.
E) Muscle fibers produce lactate when the pH of the cell is acidic.