Worldwide, more books were sold last year than in any previous year. In particular, there were more cookbooks sold. For the first time ever, most of the cookbooks sold were not intended for beginners. Indeed, more cookbooks than ever were purchased by professional cooks. However, one of the few books available on every continent is a cookbook written for beginners, entitled Problem-Free Cooking. Which one of the following is most strongly supported by the information above? ['Last year there were more cookbooks sold that were not intended for beginners than in any previous year.', 'Sales of cookbooks intended for beginners were lower last year than in previous years.', 'Problem-Free Cooking sold more copies last year than did any cookbook written for professional cooks.', 'The best-selling cookbook last year was a cookbook that was intended for beginners.']