The American Civil War, taking place from 1861 to 1865, is considered the first truly industrial war because of its use of steam ships, telegraphs, mass-produced weapons, and railroads.

(A) The American Civil War, taking place from 1861 to 1865,
(B) The American Civil War, which took place from 1861 to 1865,
(C) The American Civil War, which takes place from 1861 to 1865,
(D) From 1861 to 1865, the American Civil War
(E) The American Civil War, that has taken place from 1861 to 1865,

OA B

Source: EMPOWERgmat