The sentence should be clear, concise, and grammatically correct.
Option (A) uses “made coincident with,” which is unnecessarily wordy and formal when “coincide with” is simpler and means the same thing.
Option (B) has the same issue as (A) and also uses “who” incorrectly instead of “whom” — though “whom” could be dropped in modern usage, the phrasing still sounds awkward.
Option (C) shortens the phrase but changes “definition of reality” to “definition,” which slightly reduces precision; also, “has to first agree with” is less formal and slightly less precise than “coincide with.”
Option (D) strikes the right balance between clarity, formality, and conciseness — it keeps “definition of reality” for precision and uses “coincide with” for conciseness.