How were the union attacks of 1864 and 1865 different from earlier union attacks in the civil war?

select the best answer from the choices provided.
a. less experienced generals led the union in its later attacks.
b. western states, such as missouri, launched the union’s later attacks.
c. the union targeted both southern armies and civilians in its later attacks.
d. lincoln’s generals led the union’s later attacks instead of lincoln himself.