题目内容：
More than seven hundred years ago, the Prince of Wales had a very big and brave dog, Gelert. One day the Prince wanted to go hunting with his men. He told his dog to stay at home and lookafter his baby son. The baby was in a wooden cradle,which is like a small bed.
When the Prince came back from hunting, Gelert ran out to meet his master. He wagged (摇动)his tail and jumped to put his paws(爪子)on the Prince's chest. Then the Prince saw blood onGetert's jaws(下颚) and head.
"What have you done?" the Prince said. He rushed into his home and looked for his baby son.
The cradle was lying on its side on the floor. The clothes were torn and there was blood on them.
"So you have killed my son!" the Prince said angrily. "You unfaithful dog!" He took out hissword and killed the dog. Just as Gelert was dying, he managed to bark for a moment. Then thePrince heard a baby call to the dog.
The Prince ran out of the house and saw his son lying on the ground unhurt. Near him was adead wolf. Then the Prince knew that Gelert had defended the baby and killed the wolf.
The Prince ran back into the house but he was too late. Gelert was dead. The Prince was verysad indeed. Tears ran down his face when he realized he had killed his faithful friend. The Princecarried the body of his brave dog to the top of a mountain and buried him there. After this, the Princenever smiled again. Every morning at dawn, he walked up the mountain so that he could stand by thedog's grave for a few minutes. If you go to Mount Snowdon in Wales, people will show you whereGelert is buried. There is a sign by his grave. It reminds people of a brave and faithful dog.
根据以上内容,回答题.
Gelert was the dog of the Prince of _________. A．Scotland
B．England
C．Ireland
D．Wales
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