Concept:The phrase "to jangle someone's nerve" is an idiomatic expression meaning to irritate or annoy someone.Explanation:The word "jangle" suggests a harsh, unpleasant sound that causes discomfort.When applied to nerves, it means causing a person to feel irritated, upset, or annoyed.It does not mean physical harassment, disturbance in a mild sense, or playful teasing.Among the given options, the closest meaning is "annoy the old man".Answer:B. annoy the old man