I believe it's Camp Jupiter
New York Times and Chicago Times. Media
I'm guessing b. because then those senses help us visualize in our head. I don't know really could be wrong but, hope it helped.
Zimmermann sent the message through the U.S. State Department because he considered the U.S. to be neutral.
This means that he considered the U.S. to be unbiased in the situation, a neutral party who would not take sides in the matter. By choosing a neutral party, he believed the State Department would deliver the message without delay.