The correct answer is A. Vicksburg and Shiloh.
Step-by-step explanation
Ulysses S. Grant (1822 - 1885) was a prominent military man who led the Union army during the American civil war, later due to his success he ventured into politics until he became the president of the United States from 1869 to 1877. As the leader of the Union army, he achieved great popularity by winning the Battle of Shiloh in 1862 and the subsequent taking of Vicksburg in 1983, which were under the control of the Condeferados, achieving control of this part of the Mississippi River. After his popularity grew, the Republican Party nominated him as a presidential candidate and later won the victory. According to the above, the correct answer is A. Vicksburg and Shiloh.