On Average, How Much Does the PaCO₂ Rise for Every

On average, how much does the PaCO₂ rise for every 1 mEq/L increase in the plasma [HCO₃-]?

A) 0.2 mm Hg
B) 0.5 mm Hg
C) 0.7 mm Hg
D) 1.0 mm Hg