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McDonald's has started testing three new kinds of quarter pounder. It also has a McMuffin made of egg whites up its sleeve. The burgers are hardly world-changing: two of them feature bacon and cheese and the third is a cheeseburger with some extras. However, the fact that is it going for so many menu changes is significant.
It's a sign that the chain is having to work hard to turn its declining fortunes around. So why has it fallen out of favour?