How was the North able to replenish its military in the face of staggering loses on the battlefield?

AIt inflicted even heavier loses on the Confederacy.
BFor the first time, a wartime draft was begun.
CThe Union accepted help from foreign mercenaries.
DA steady stream of new immigrants provided help.

Verified Answer :

Going back to the Middle School days,

During the Civil War, there were 2 main reasons the North was able to win:

1.) The North had a larger population

2.) Conscription

You might be asking, what is conscription?

Conscription is when a large number of newly arrived immigrants were recruited into the Northern Army.

Thus, D, is your answer.

Answer:

D) A steady stream of new immigrants provided help.

Explanation:

The Irish were a key piece of enlistment regularly falling off the ship and into the Army.  

Shaded Troops were a huge piece of the Northern Army. Brought up in independent regiments they endured noteworthy partiality and setbacks. At Fort Pillow on the Mississippi Confederate Soldiers slaughtered various dark Union officers that progressed toward becoming prisoners.