单选题 The image of the volunteers on television advertising provides ______ into people's attitudes toward volunteering.
【正确答案】 A
【答案解析】解析：本题考查题意。insight“洞察”，foresight“预测”，revelation“启示”，specification“尺寸，规格”。根据题干上下文，选择insight是最合适的。