In a Workout Your Muscle Cells Produce Lactate,yet You Maintain

In a workout your muscle cells produce lactate,yet you maintain a constant blood pH because _________.

A) metabolic acids are neutralized in muscle cells before released into the blood
B) metabolic bases are produced at the same rate by muscle cells to neutralize the acids
C) the respiratory system removes excess H⁺ from the blood before the pH is lowered
D) the body contains chemicals called buffers that resist changes in pH
E) endothelial cells secrete excess H⁺ to prevent a decrease in pH