How was the north able to replenish its military in the face of staggering loses on the battlefield?
a) it inflicted even heavier loses on the confederacy.
b) for the first time, a wartime draft was begun.
c) the union accepted from foreign mercenaries.
d) a steady stream of new immigrants provided .

The correct answer is B. The North stablished a wartime draft that helped to bend the Confederate forces, through the numerical supremacy of their forces.

After the attack of Fort Sumter, President Lincoln recruited a volunteer army in each state.

Even though most of the federal properties on Confederate soil had changed hands peacefully, there were still a number of resisting forts, especially Fort Sumter, and Lincoln was determined to keep it that way. On April 12, General Pierre Gustave de Beauregard, following the orders of President Davis, began a cannon fire against the fort, which, lacking any help, had to surrender, as well as the others. Lincoln, then, ordered the states to recruit volunteers to form troops to recover the lost forts and maintain the Union. As the rebellion so far seemed small, the request would be limited to 75,000 men for 90 days. Many states had already been doing it for several months, so they could start moving their militias the day after the presidential order.