With Respect to Psychology Today,which of the Following Statements Is

With respect to psychology today,which of the following statements is most true?

A) A single theoretical orientation dominates present-day psychology.
B) Ultimately, a unified theory of behaviour and mental processes will emerge.
C) Multiple theoretical approaches exist in psychology because we have made little progress in understanding thought and behaviour.
D) Psychology is diverse in its theoretical orientations because the subject matter of psychology is diverse.