When Dehydration Reduces the Compensation Possible for Acidosis Resulting from Prolonged

When dehydration reduces the compensation possible for acidosis resulting from prolonged diarrhea,what significant change in arterial blood gases indicates this?

A) serum pH would rise above 7.45
B) serum bicarbonate levels would increase,serum pH would remain in normal range
C) serum bicarbonate levels would decrease,serum pH would drop below 7.35
D) serum PCO₂ would rise,serum pH would be around 7.4