Which of the Following Statements Is LEAST-Likely True

Which of the following statements is LEAST-Likely true?

A) The first few minutes of an engine's operation are critical to its long life.
B) A new part might look quite smooth to the naked eye.Compared to a used, worn-in part, however, it is quite rough.
C) Heavy engine loads should be encouraged during break-in.
D) Moving parts are continuously separated by a film of oil; only the peaks on rough surfaces touch.