What Can Be Said About the Relationship Between Rational Thinking

What can be said about the relationship between rational thinking and prejudice?

A) The great rational minds of the world have had no prejudices.
B) It is possible to be rational and prejudiced at the same time.
C) Holding prejudices keeps rational thinkers for being able to achieve greatness.
D) It is not possible to be rational and prejudiced at the same time.