Which of the following statements is most accurate?

Which of the following statements is most accurate?
 
  a. According to the medieval intellectual tradition, truth was all that was required to guide individuals.
  b. Medieval thought accepted both revelation and reason as necessary to define the meaning of life and set standards for individuals.
  c. Occasionally, the scholastic tradition followed a course that let philosophy and reason challenge faith.
  d. Medieval thought accepted both revelation and reason as necessary to define the meaning of life and set standards for individuals and occasionally, the scholastic tradition followed a course that let philosophy and reason challenge faith.
  e. In contrast to early Christians, medieval thinkers did not try to reconcile religion and philosophy.