challenge: What was the outcome of the court case Prometheus Radio Project v. Federal Communications Commission?
  
  A. The court found that the FCC had successfully promoted minority broadcast ownership.
  B. The court ruled in favor of the FCC, upholding the new cross-media ownership rules.
  C. The court ruled that the FCC had failed to justify their changes in cross-media ownership and set aside the new rules.
  D. The court determined that the Diversity Index was an effective tool for measuring market concentration.
  Answer: 