Trench warfare in World War I was characterized by . A. a series of Russian victories.
B. heavy casualties and little territorial gain.
C. swift invasions and decisive attacks
D. tremendous German victories in the East

Trench warfare in ww1 was where soilders stood in dugged-up holes in the ground to be well hidden from the enemy and able to shoot them, from this I would guess b

Explanation:

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.