Which of the following statements regarding ductile-brittle transition is NOT true? Select one:

A. There is a sudden loss of ductility below a critical temperature. 1

B. There is a loss of roughness at lower temperature.

C. Carbon steel are less susceptible to ductile-brittle transition.

D. Some pure metals, such as Aluminum, Copper or Nickel, do not exhibit a ductile-brittle transition.