challenge: Who are the two French philosophers that Place Jean-Paul-Sartre-et-Simone-de-Beauvoir is named after?
  
  A. Simone de Beauvoir and Gabriel Marcel
  B. Jean-Paul Sartre and Simone de Beauvoir
  C. Martin Heidegger and Emmanuel Levinas
  D. Jean-Paul Sartre and Martin Heidegger
  Answer: 