challenge: What was the outcome of the Johnson v. Transportation Agency case in the Supreme Court?
  
  A. The case was sent back to a lower court for further review
  B. The Agency's plan was struck down by a 6–3 vote
  C. The Agency's plan was upheld by a 6–3 vote
  D. The Agency's plan was upheld by a 5–4 vote
  Answer: 