Pepsinogen Is Produced by __________ and Is Activated by __________,Which

Pepsinogen is produced by __________ and is activated by __________,which is secreted by __________.

A) chief cells;carbonic anhydrase (CAH) ;parietal cells
B) chief cells;hydrochloric acid (HCl) ;parietal cells
C) parietal cells;hydrochloric acid (HCl) ;chief cells
D) parietal cells;carbonic anhydrase (CAH) ;chief cells
E) enteroendocrine cells;carbonic anhydrase (CAH) ;parietal cells