1. First Battle of Bull Run,
2. Battle of Antietam
3. Battle of Gettysburg
4. Sherman's March to the sea
The answer is C. i just took the test and i got it right.
The second choice mentioned above exposed the element that caused the British to surrender at Yorktown George. The troops of Washington outnumbered the British soldiers by two to one, referring to August 27-29, 1776. The army was defeated completely, and that is the main factor.
Look it up on google take a picture and it shows your results :)