Answer:
Option A, fat
Explanation:
The definition of the "steatohepatitis" can be determined by examining the etymology of the root phrases that comprise the medical term: steat/o-, hepat/o-, and -itis.
The root steat/o- comes from Latin origins and means fat. The root phrase adip/o-, as in the words adipose and adipocytes, is also used to refer to fat in some medical jargon.
The root hepat/o- comes from Latin, Greek, and Old French origins meaning liver.
The suffix -itis has origins from Modern Latin and Greek, denoting a pertinence to inflammation in the anatomical structures referred to by the roots that precede it.
Together, "fat liver inflammation" leads to a definition: an accumulation of fat in the liver cells, option A.