The correct answer is B: False.
Gastric chief cells, also known as peptic cells or zymogenic cells, primarily produce pepsinogen, an inactive form of the enzyme pepsin. When pepsinogen is secreted into the stomach, it is activated by the acidic environment created by hydrochloric acid (HCl), which is produced by parietal cells in the gastric epithelium. Therefore, while HCl is crucial for digestion in the stomach, it is not produced by the gastric chief cells.