Which of the Following Statements About the Stability of Temperament

Which of the following statements about the stability of temperament is true?

A) Temperament, by definition, is merely a style exhibited during infancy and thus does not persist into childhood.
B) All temperamental dimensions are stable from infancy into later childhood.
C) No aspects of temperament are stable from the prenatal period into infancy.
D) Some aspects of temperament tend to be more stable than others.