Read the lines from "Barbara Frietchie."

"Halt!"— the dust-brown ranks stood fast."Fire!"— out blazed the rifle-blast.

It shivered the window, pane and sash;It rent the banner with seam and gash.

What do the words blast, shivered, rent, and gash add to the mood of these lines?
a) Joy
b) Sadness
c) Fear
d) Excitement