Sir : I got your letter and was glad to find you had not forgotten Jourdon , and that you wanted me to come back and live with you again , promising to do better for me than anybody else can . I have often felt uneasy about you . I thought the Yankees would have hung you long before this for harboring Rebs they found at your house . I suppose they never heard about your going to Col . Martin 's to kill the Union soldier that was left by his company in their stable .

Pick from:
[a]. Rebs must refer to members of the rebel army during the World War 2 ..
[b]. Rebs must refer to members of the rebel army during the American civil war ..
[c]. Rebs must refer to members of the union army during the American civil war ..
[d]. None of the above choices ..
Q: What might the term rebs refer to in this story ?
[b].