Which of Barbara Frietchie's actions leads most directly to a conflict?

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,
She took up the flag the men hauled down;
In her attic window the staff she set,
To show that one heart was loyal yet.

A. She notices the flags flapping in the wind.
B. She puts the flag in the window after the men have taken it down.
C. She rises up, even though she is bowed over at ninety years of age.