A Patient Who Is Visiting the Clinic Complains of Having

A patient who is visiting the clinic complains of having "stomach pains for 2 weeks" and describes his stools as being "soft and black" for about the last 10 days.He denies taking any medications.The nurse is aware that these symptoms are most indicative of:

A) excessive fat caused by malabsorption.
B) increased iron intake resulting from a change in diet.
C) occult blood resulting from gastrointestinal bleeding.
D) absent bile pigment from liver problems.