After 3 Months of Self-Management for Symptoms of Gastritis Is

After 3 months of self-management for symptoms of gastritis is unsuccessful, a patient goes to the physician and an extensive carcinoma of the stomach is diagnosed. The patient asks the nurse how the disease got so advanced. The nurse's explanation should be based on the knowledge that carcinoma of the stomach is:

A) Rarely diagnosed early because the symptoms are usually nonspecific until late in the disease
B) Painful in early stages and often misdiagnosed as myocardial infarction
C) Difficult to accurately diagnose until late in the disease process
D) Usually diagnosed following the discovery of enlarged lymph nodes in the epigastric area