5. Antitrust violations: Enduraforce sells a wide variety of energy bars to a majority of sporting goods stores in a region. Enduraforce's newest energy bar, OatZing, is not very popular. Because of this, Enduraforce is requiring that sporting goods stores buy at least 50 boxes of OatZing per energy bar order. This is an example of which of the following practices? A. Tying contracts B. Interlocking directorates. The Federal Trade Commission is responsible for: a. Setting routes and minimum freight rates in the trucking industry b. Investigating the unfair competitive practices of firms c. Regulating airfares in the commercial airline industry.