Answer: It is A, B and C.
Explanation: I took test and got right, also I have link to notes my teacher gave us.
https://learning.k12.com/d2l/le/enhancedSequenceViewer/775727?url=https%3A%2F%2Fe02711f5-1353-40b6-af9b-349f7ff846bd.sequences.api.brightspace.com%2F775727%2Factivity%2F222049269%3FfilterOnDatesAndDepth%3D1
On page 4 at bottom.
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Answer: B
Explanation: Despite heavy Confederate casualties (9,000), the Battle of Second Bull Run (known as Second Manassas in the South) was a decisive victory for the rebels, as Lee had managed a strategic offensive against an enemy force (Pope and McClellan's) twice the size of his own.