Although René Descartes Was a Philosopher, His Philosophy Was Important

Although René Descartes was a philosopher, his philosophy was important for the development of psychology.His philosophy concerning the origin of knowledge stated

A) that there is no knowledge without truth.
B) that one can only believe those things that have no possibility of doubt.
C) that knowledge is discovered through sense experience.
D) that humans are born blank slates.
E) none of the above