Answer:
B. Entrapment of Confederate soldiers at Appomattox Courthouse
Step-by-step explanation:
The US Civil war which was a war between the Southern part (those against the slave trade and ownership) and the Northern part of United States of America (those in favour of slave trade and ownership) lasted more than 3 years with series of setback.
At the end, General Lee of the Confederate army had to surrender to General Ulysses after General Gordon attacked the Ulysses with the aim to break through Federal lines at the Battle of Appomattox Court House. His failure led to the Confederate Army being surrounded.