What Is the Correct Translation and Definition of the Abbreviation

What is the correct translation and definition of the abbreviation FOBT?

A) Fecal occult blood test, a test of the feces to discover blood not visibly apparent
B) Feces of bariatric tests, the testing of fecal matter to determine the correct treatment plan for a person with weight issues
C) Final oral biopsy test, the last test before determining if a patient requires a tooth extraction
D) Flatulent occult barium treatment, the treatment of excessive digestive gas using barium
E) Flatus, odontodynia, biligenesis treatment, treatment for the combination of symptoms passing gas, tooth pain, formation of bile