Why Was the Battle of New Orleans Considered to Be

Why was the Battle of New Orleans considered to be ironic?

A) It took place several weeks after a peace treaty had been negotiated.
B) It led to loss of hundreds of American lives.
C) It accomplished in one battle what the entire War of 1812 had not until that time.
D) It gave rise to the "Era of Good Feelings."
E) It resulted in the nullification of the Hartford Convention.