Which excerpt best states the central idea of the second paragraph of The Dark Game?
A. Most of the war was fought in states south of Washington, D.C. . . .
B. For the Union soldiers, this meant they had to fight in unfamiliar and hostile territory.
C.This matter of geography affected the spies who worked behind enemy lines. D. Confederate spies could usually find a safe house, or at least a sympathetic soul . . .