The Nurse Administers Alternating Doses of Two Antacids into the NG

The nurse administers alternating doses of two antacids into the NG tube of a client with a duodenal ulcer. The finding that best indicates that this drug regimen has been successful is

A) absent NG tube drainage.
B) decreased abdominal rigidity.
C) increased gastric pH.mild diarrhea.
D) mild diarrhea.