The correct answer is A. "When the two boys were going to high school, Ernest often came over in the evening to study with Claude, and while they worked at the long kitchen table Mrs. Wheeler brought her darning and sat near them, helping them with their Latin and algebra. "
Step-by-step explanation
A flashback is the name of a resource that is used in literature, television, and cinema to connect the past (memories) with events of the present. According to the definition above, the correct answer is "When the two boys were going to high school, Ernest often came over in the evening to study with Claude, and while they worked at the long kitchen table Mrs. Wheeler brought her darning and sat near them, helping them with their Latin and algebra." because an important event of the past is explained and this relates to several characters, and that allows us to understand the rest of the story. So the answer is A.