跨文化交际 — 英语选择题

某国际志愿者项目的礼仪卡说明：在甲文化中，点头通常表示同意；在乙文化中，点头只表示正在倾听，并不代表同意。来自乙文化的交换生微笑点头后，负责人不确定他是否接受任务。负责人最得体的做法是什么？A. Treat the nod as a clear agreement and assign the task. B. Ask politely whether he agrees to take the task. C. Tell him to stop nodding before answering. D. Assume his smile means he refuses the task.