They rise out of the earth, they sweat and starve for a few years, and then they sink back into the nameless mounds of the graveyard.
句意：他们呱呱坠地，在世上受苦受累忍饥挨饿几年，又沉睡到无名墓地的泥土里。sweat在这指做苦工，过度工作。A选项与划线处意义最为接近，故选A。