adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-BUSINESS","nativepaywallcategory" : "NATIVE_PREM-BUSINESS"};NEW YORK — It will be easier for unions to bargain for better pay and working conditions on behalf of millions of workers at McDonald’s, Wendy’s and other fast-food chains after a National Labor Relations Board ruling on Thursday.