Step 1: Historical shift in nomenclature.
Emil Kraepelin grouped chronic psychoses as \textit{dementia praecox}. In 1908, Swiss psychiatrist Eugen Bleuler argued the disorder is not necessarily dementia nor confined to youth and coined schizophrenia (“split mind”) to emphasize splitting of psychic functions.
Step 2: Eliminate distractors.
Freud (B) developed psychoanalysis; Kraepelin (C) used \textit{dementia praecox}, not the new term.
Step 3: Conclude.
\[
\boxed{\text{Bleuler (Option A).}}
\]