Answer:
D; Lee marched over the mountain wall
Explanation:
"...On that pleasant morn of the early fall
Over the mountains winding down,
Horse and foot, into Frederick town.
Forty flags with their silver stars,
Forty flags with their crimson bars,
Flapped in the morning wind: the sun
Of noon looked down, and saw not one.
Up rose old Barbara Frietchie then,
Bowed with her fourscore years and ten;
Bravest of all in Frederick town,
Hope that helps :)