Esperanza looked down at Silvia's dirty hands. Silvia grinned up at her and Esperanza's first thought was to pull her hand away and wash it as soon as possible. Then she remembered Mama's kindness to the peasant girl on the train—and her disappointment in Esperanza. She didn't want Silvia to start crying if she were to pull away. She looked around at the dusty camp and thought that it must be hard to stay clean in such a place. She squeezed Silvia's hand and said, "I have a best friend, too. Her name is Marisol and she lives in Aguascalientes."

This passage shows a change in Esperanza because

she forgets her best friend, Marisol, and makes Silvia her new best friend.
she washes her dirty hands instead of asking Silvia to wash hers.
she is gentle with Silvia instead of acting unkind like she did with the peasant girl.
she remembers Mama’s kindness, then acts rudely to the dirty little girl.