How Valid Is this Popular and Heroic View of Dunkirk as "The Miracle on the Beaches"?

"A brave of soldiers, betrayed by their allies, fought their way to home and safety. They were carried across the last crucial miles of water by a huge armada of small boats crewed by volunteer civilians."
Using the information in all the sources in sections A-D and your own knowledge, how valid is this popular and heroic view of Dunkirk as "The Miracle on the Beaches"?
A myth is a common story or legend. To most it is something not true, a fiction, or falsehood. A truth disguised and distorted. The myth of Dunkirk was created on purpose by the British, to keep morale up. …