Which sentence from My Antonia shows a contrast?

“They had all, like Antonia, been early awakened and made observant by coming at a tender age from an old country to a new.”
“Some of the high-school girls were jolly and pretty, but they stayed indoors in winter because of the cold . . .”
“But every one of them did what she had set out to do, and sent home those hard-earned dollars.”
“Their children are better off than the children of the town women they used to serve.”