Topic: There are gold boxes, silver boxes and copper boxes on the table. There is a saying on the gold box: "Jewelry is not in this box", on the silver box: "Jewelry is in the gold box" and on the copper box: "Jewelry is not in this box". Now we know that only one of these three sentences is true, so ()

The jewels are in the gold box.

B.the jewels are in the silver box.

C.the jewels are in a copper box.

D. the jewelry is not in any box

Analysis: If the jewelry is in the gold box, the words on the silver box and the copper box are true, then the assumption is not true. If it is in a silver box and the words on the gold box and the copper box are true, then the assumption is not true. If it is in a copper box and the words on the gold box are correct, then the assumption is established. If it is not in any box, the words on the gold box and the copper box are all right!

So c is correct!