The case of Pinkerton v. U.S. (1946) deals with what rule?
a. the rule that the crime of conspiracy and the crime the conspirators agree to commit are separate offenses.
b. the rule that even presence at the scene of a crime followed by flight isn't enough action to establish accomplice actus reus.
c. the common law rule that the government couldn't try accomplices until principals in the first degree were convicted.
d. the accessory liability rule that it is not as blameworthy to help someone else escape prosecution as it is to participate in the crime itself.