MONTREAL( Reuters)-Quebec's plans to attract more French-speaking newcomers are unnerving some business owners who say they need immigrants from varied backgrounds to address a tight labor market in the Canadian province. Unlike other provinces, Quebec gets to choose its economic immigrants.... But it does become a limiting factor when we're looking to attract the best people and talent that we need," said Veronique Proulx, president of Quebec Manufacturers and Exporters. She called Quebec's sh