What effect did the capture of vicksburg have upon the confederacy?
a. confederate forces fled to tennessee.
b. grant was appointed as commander of the army.
c. all supplies and communications from the west were cut off.

c. All supplies and communications from the west were cut off.

Explanation:

Vicksburg campaign of 1863 was a major military action against the Confederacy by the Union Army of Tennessee. Vicksburg was a stronghold for the confederates on the Mississippi River and thus it was important to capture by the Union Army of Tennessee. General major S. Grant crossed the Mississippi River and put the Confederate in a defensive position around the fort of Vicksburg. Two major assaults were charged on the fortification of Confederate but with little success. Then S.Grant besiege the fort for forty days to cut off the supply and communication and the result was the surrender of Confederates.

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explanation:

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first of all, it's important to say that the book we shall not be moved, written by joan dash, is about the first strike of women in the united states in the year 1909. the best historical detail to clarify the reader's undertanding is the phrase "general strike". this strike involved women working at a garment factory who decided to protest   long working hours, low wages and brutal conditions. this strike became known as "the new york shirtwaist strike" or "the uprising of the 20,000". the strike mostly involved jewish women who did not speak english or who had a basic knowledge of the english language. finally, the strike went on from november 1909 until february 1910.