Please choose the correct solution to the question: To fix a broken plate.

Solution1: If you break a piece of china, instead of replacing it, you can mend it by melting some common alum in an old iron spoon. Apply the molten alum to the pieces and then keep the pieces in position by tying a string around them until the alum hardens and sets. This bonding is only temporary.

Solution2: If you break a piece of china, instead of replacing it, you can mend it by melting some common alum in an old iron spoon. Apply the molten alum to the pieces and then keep the pieces in position by tying a string around them until the alum hardens and sets. This bonding is dishwasher safe.

Answer format: solution1/solution2