Which of the Following Situations Is Most Likely to Trigger

Which of the following situations is most likely to trigger liability for a vertical boycott under Section 1 of the Sherman Act?

A) Evidence indicates that a conspiracy existed between a manufacturer and its nonterminated dealers to terminate a price-cutter.
B) Evidence indicates that a manufacturer unilaterally refused to deal with a price-cutter who failed to follow the manufacturer's suggested resale prices.
C) Evidence indicates that a manufacturer has terminated a discounting distributor after receiving complaints from its other distributors.
D) Evidence indicates that a manufacturer and its nonterminated dealers were engaged in an unlawful vertical price-fixing conspiracy.