While reading The Scarlet Ibis, a student begins to infer that the narrator's younger brother has a serious medical issue.  Which piece of evidence from the text below likely contributed to that inference? Select one: a. "However, one afternoon as I watched him...he looked straight at me and grinned." b. "The doctor had said that he mustn't get too excited...must always be treated gently." c. "Doodle was frightened of being left." d. "Each day, barring rain, we sneaked into Old Woman Swamp . . .."