In Skinner V

In Skinner v. Railway Labor Executives Association, the Court

A) Ruled that the Fourth Amendment was applicable to a private industry.
B) Ruled that the taking of blood and breath for analysis were indeed searches within the meaning of the Fourth Amendment.
C) Invoked the special-needs exception to the Fourth Amendment and held that the warrant and probable cause requirements were impractical for the railroad and the government's mutual interest in promoting public safety.
D) All of the above.