Answer: A. The Germans often sent important messages concerning their war efforts to their ambassador in Washington, D.C.
Explanation: Readers who make inferences use the clues in the text along with their own experiences to help them figure out what is not directly said. Inference also involves using what you know to make a guess about what you know or reading between the lines.
(problem) I can't find my pen
(solution) ask someone to lend you one or retrace your day and look around for it.
I'm not sure if I answered this right but I tried