Which concrete detail is most relevant to frederick douglass's autobiography?
a. my feet have been so cracked with the frost, that the pen with which i am writing might be laid in the gashes.
b. the pants master daniel wore when we went hunting for birds were light gray.
c. the man who us ashore had a weathered face and icy eyes and a battered fisherman's cap upon his head.
d. the great house was painted white with coral trim.

Armed with invisible ink, a cipher system, and a passion to end the war and preserve the union, elizabeth van lew became butler's eyes and ears in the confederate capital city. truth be told, however, she became much more than that. she became a spymaster, the person responsible for running a network of agents, couriers, and safe houses that was very active during the war. in addition to the spying, elizabeth van lew continued to maintain her church hill home as a safe house and something of a local union spy headquarters. —the dark game, paul janeczko what is the central idea of this passage? van lew’s home was used as a safe house, which was critical to the confederacy. van lew had a passion to end the war and preserve the union. van lew was a spymaster, a leading force in the espionage activities for the union. van lew did not enjoy working for general butler.