Apple's contract with book publishers gave them a unified front to approach Amazon to demand higher prices for their e-books, The Department of Justice leaped into the fray and ultimately forced the publishers to back down. Suppose that the Department of Justice had not been so quick to act. What actions could Amazon's managers have taken to preserve their bargains with the publishers? (Check all that apply) A. Amazon's managers could have offered an exclusive partnership with one of the publishing houses for a lower price. [) B. Amazon's managers could remind the publishers about Amazon's volume of book sales to incentivize them to cheat on the cartel, )C. Amazon's managers could have offered an exclusive partnership with one of the publishing houses for a higher price. D. Amazon's managers could threaten to stop selling the publishers' books in their marketplace