The correct answer to this open question is the following.
Although there are no options included, we can say the following.
Tancred de Hauteville stopped the massacre and demonstrate that the residents were under his protection when captured them for ransom and forced them to hold a standard flag that demonstrated his rule.
Tancred de Hauteville was known for his deeds during the first crusade. He was a Norman and lived in the south of Italy. With his uncle, he participated in the Crusade and was very successful in capturing Turkish Tarsus. For his many accomplishments in battle, particularly in 1099, after the victory in Jerusalem, he was awarded a new title: the Prince of Galilee. Years later he became the regent of Antioch, modern-day Syria.
The important result of the Union victory at Vicksburg was that the Union now controlled the Mississippi River. The correct option among all the options given in the question is option "A". This also helped the Union to cut off most of the Western States from the hands of the Confederate army. Also the Union had the control over the food supplies and this made the Confederate army surrender quickly.