Read the excerpt from “Clara Barton’s Childhood.” With the patience of a much older, wiser nurse, nothing was too hard for Clara to do well and quickly, if in any way it would make David more comfortable. She remained by his side through many new treatments and failed attempts. David’s cure finally came through a new treatment using a vapor bath, and Clara Barton fulfilled her earliest apprenticeship as a nurse. How does the author best reveal that Clara idolized her brother?