听力原文：W: I found an expensive diamond necklace in the rest room this morning.M: If I we

听力原文：W: I found an expensive diamond necklace in the rest room this morning.

M: If I were you, I would tarn it in to the security office.

What does the man suggest the woman should do？

A．Turn in the necklace to the security office.

B．Keep the necklace.

C．Put the necklace back to the rest room.

D．Sell the necklace to the security office.

请帮忙给出正确答案和分析，谢谢！