Answer: The Germans often sent important messages concerning their war efforts to their ambassador in Washington, D.C.
Explanation:
<em>The Dark Game</em> is a book written by Paul B. Janeczko. It tells a story about cyber espionage, which was quite present throughout the history of the United States.
In the given passage, the cables are described as <em>"an opportunity to gain access to </em><em><u>secret diplomatic messages</u></em><em> sent from Berlin to its ambassador in Washington, D.C." </em>These secret diplomatic messages were certainly important, since the British attempted to reveal them.
In the text, nothing is said about the German plans upon cutting the cables. It is also not stated whether the cables were the only type of communication, or if the new cables are planned. The other options are, therefore, incorrect.
