Utilize the input text as a context reference, choose the right relationship between 'was' and 'HarperCollins' from the options.
Options: owner of, publisher, founded by, chief executive officer

At book publishing, HarperCollins had a strong quarter with revenues down only 3% to $407 million and segment EBITDA up 9% to $47 million despite significant bricks-and-mortar store closures, which was a far better performance than we had anticipated.
publisher