How did the Civil War end?

On April 9, 1865, General Robert E. Lee surrendered his Confederate troops to the Union's Ulysses S. Grant at Appomattox Court House, Virginia, marking the beginning of the end of the grinding four-year-long American Civil War

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.