(my real question had bad phrases, so I had to shorten it... if this is not enough for you guys, I will find a way to show the entire thing...)

At this battle, Union troops tried to invade Richmond. Lee and Jackson devised a strategy to attack both sides of the Union flanks by surprise and successfully threw back the Union forces in Lee's greatest victory of the war.

What was the name of the victory described above?

A. the Battle of Fredericksburg
B. the Battle of Murfreesboro
C. the Battle of Fort Donelson
D. the Battle of Chancellorsville