礼貌借用与分享的交际用语 — 英语选择题

小明想借同桌的尺子，先礼貌地询问；同桌答应并把尺子递给他。小明应怎样说？A. Can I borrow your ruler, please? — Sure. Here you are. — Thank you. B. Give me your ruler. — No, thank you. — Here you are. C. Can I borrow your ruler, please? — Thank you. — Sure. Here you are. D. Here you are. — Can I borrow your ruler, please? — Thank you.