Read the excerpt from “John Burns: The Unlikely Civil War Hero.” When John Burns heard of the fight to keep the Union in 1861, he immediately knew that he wanted help. Burns was a veteran of the War of 1812. The forty-nine years since seemed to have flown by mighty fast, and now war had come calling again. John stood, straightened his 67-year-old back, and marched down to the Gettysburg recruiter.

Which detail from this excerpt best supports the central idea that Burns was an experienced soldier?

Burns lived near historic Gettysburg.
Burns strongly supported the Union.
Burns was a 67-year-old man.
Burns was a veteran of the War of 1812.