The following news article was on the BBC in July 2011.After reading the article, answer the questions below based on your understanding of research methods.Researchers quizzed customers before and after a law was passed in New York in 2008 forcing restaurants to display nutritional information. Researchers carried out cross-sectional surveys with more than 7,000 people in 2007 and another 8,500 in 2009 at 168 locations...