principles of logic.

1. Søren Kierkegaard, a Danish philosopher of the 19th century, known as the father of existentialism, was primarily concerned with

  a. advanced principles of logic.
  b. revitalizing the philosophical ideals of Socrates and classical Greece.
  c. tearing down all religious principles in favor of the abyss call “atheism.”
  d. grounding the truths of religion and philosophy in the subjective experience of the individual.
  e. All of the above.