Answer:
The soldiers A) felt that their efforts were not successful.
Step-by-step explanation:
From the excerpt we are studying here, we can tell that soldiers were mistaken in their first judgment of their enemy. They thought they would easily win over a bunch of "peasant guerrillas" only to find themselves being killed each week. When the narrator says, "the blood being spilled broke our early confidence" he means soldiers now understood their efforts were not being successful.
This excerpt was taken from "A Rumor of War", a memoir by Philip Caputo. Caputo - who joined the war at first for the excitement the danger caused in him and for the ideal of serving his country - soon realized his mistake. Instead of coming back home filled with heroic stories about epic battles, the author says his own story is boring. Battles would last forever, American soldiers would keep on dying while the enemy hid in jungles full of traps and snipers.