This excerpt is from a poem in which w. b. yeats speaks about those who took part in the easter rising in ireland in 1916. what do these lines suggest about the speaker’s view of the rebels?

hearts with one purpose alone
through summer and winter seem
enchanted to a stone
to trouble the living stream.
the horse that comes from the road.
the rider, the birds that range
from cloud to tumbling cloud,
minute by minute they change;
a shadow of cloud on the stream
changes minute by minute;
a horse-hoof slides on the brim,
and a horse plashes within it;
the long-legged moor-hens dive,
and hens to moor-cocks call;
minute by minute they live:
the stone's in the midst of all.

too long a sacrifice
can make a stone of the heart.

a. he is repelled by their implacable hatred for the english.
b. he admires their fixity of purpose and their sacrifice for their country.
c. he wishes he could share their immovable commitment to their cause.
d. he feels that they have been unable to adapt to the changing times.