Which inference can a reader make based on the information in the excerpt?

A). The Germans often sent important messages concerning their war efforts to their ambassador in Washington, D.C.

Explanation:

The given excerpt from 'The Dark Game'  the conveys significant information about the role of cables in delivering the secret messages. These details allow the readers to infer that 'the Germans used to send 'secret diplomatic messages' related to their war efforts from Berlin to their ambassador in Washington, D.C.' which could have been quite significant in planning the strategies. Thus, in order to stop this communication, the British 'broke the channel by cutting all the five cables that carried the communications.' Therefore, option A displays the correct inference.

my guy how are we supposed to know

i think it's either 'to expose the corruption of the communists in russia', or 'to criticize animal brutality by communists in russia.'  

hope this ! : )