Read the passage from My Antonia. Those girls had grown up in the first bitter-hard times, and had got little schooling themselves. But the younger brothers and sisters, for whom they made such sacrifices and who have had "advantages,” never seem to me, when I meet them now, half as interesting or as well educated. The older girls, who helped to break up the wild sod, learned so much from life, from poverty, from their mothers and grandmothers; they had all, like Antonia, been early awakened and made observant by coming at a tender age from an old country to a new.

Which theme is best supported by the comparison in this passage?

A. Families succeed when they work together.
B. It is not necessarily better to have financial advantages.
C. Town life is better than life on the prairie.
D. It is easier to be rich than to be poor.