FILE – In this March 4, 2015 file photo, an order of McDonald’s Chicken McNuggets is displayed for a photo in Olmsted Falls, Ohio. McDonald?s is testing Chicken McNuggets with no artificial preservatives as it works to revive its U.S. business. The world?s biggest hamburger chain says it began testing the new recipe in about 140 stores in Oregon and Washington in March 2016. (AP Photo/Mark Duncan)
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