The following excerpt is taken from W.B. Yeats's poem "Easter, 1916," in which he examines his feelings toward those who took part in the Easter Rising in Ireland. Which set of lines suggests that Yeats considered the rebels inflexible?

A.) Too long a sacrifice
Can make a stone of the heart.

B.) We know their dream; enough
To know they dreamed and are dead;

C.) And what if excess of love
Bewildered them till they died?

D.) Now and in time to be,
Wherever green is worn,
Are changed, changed utterly
A terrible beauty is born.