The correct answer is D) stations.
Places, where runaways were fed, clothed, and hidden, were often called stations.
In times of slavery in the Southern states of the United States, the "Underground Railroad." Many people who were against segregation helped slaves that abandon the fields. They escaped and used the "Underground Railroad," that was not transportation, but a series of tunnels where the slaves could escape. The stations where places where runaways were fed, clothed, and hidden.
