What event ultimately ended the Civil War? A Lincoln's delivery of his second inauguration speech

B. Entrapment of Confederate soldiers at Appomattox Courthouse

C. Lee's surrender at the final battle of Vicksburg

D. General Sherman's destruction of Atlanta and Savannah

B. Entrapment of Confederate soldiers at Appomattox Courthouse

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.

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.