Jim is a 60-year-old man who presents with vomiting. He denies seeing any blood with emesis, which has been occurring for 2 days. He does note a dark, granular substance resembling the coffee left in the filter after brewing. What do you suspect?
A) Bleeding from a diverticulum
B) Bleeding from a peptic ulcer
C) Bleeding from a colon cancer
D) Bleeding from cholecystitis