Read the excerpt from "The Dark Game."On several occasions Room 40 received an unexpected butwelcome gift when a German codebook was recovered after a seabattle and presented to the British code breakers. One such giftwas a codebook from the German ship Magdeburg, a light cruiserthat ran aground on an island off of Finland. When Russian shipsquickly bore down on the cruiser, the captain of the stranded shipimmediately did what all naval officers were taught to do: heordered his signalman to bring him the ship's codebook so hecould throw the book, wrapped in lead covers, into the sea. Butbefore the signalman could deliver the book to his captain, he waskilled by Russian guns. When the Russians recovered his body, thesailor was still clutching the codebook in his arms. Which type of structure is used in the text?