Which major publishing merger created Penguin Random House, now the world's largest trade publisher?

The publishing industry has undergone significant consolidation over the decades, with historic imprints merging into larger media conglomerates. These mergers have reshaped the literary landscape, affecting everything from author contracts to market diversity. How well do you know the business behind your favorite books? Test your knowledge of publishing brand history with this challenging question about one of the most significant publishing mergers of the 21st century.

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Penguin Books merged with Random House in 2013, owned by Bertelsmann
HarperCollins acquired Random House in 2008, rebranding as Penguin Random House in 2010
Penguin Group purchased Hachette's Random House division in 2015
Random House and Penguin were simultaneously acquired by Macmillan in 2011