阅读短文, 从每题所给出的(A、B、C、D)四个选项中选出最佳选项。
Many years ago, there lived an old man with his three sons, Dharma, Harrison and Keith, in a village. The man worked hard when he was young, son he had the largest farmyard and the most beautiful house in the village. However, his sons were all born to be lazy, which mad him disappointed. He was worried that his sons would use up his money and starve to death.

   One day, the old man came up with a plan. He called his sons and said to them, "Look, my dear sons: in the land we have at the farmyard, there is lots of hidden gold. If you should work together, you may find it”

  In a wish to find out the gold, his sons worked hard from the morning to the evening digging and digging all through the land. The days had passed, but they didn't find what were they were looking for. They got frustrated and angry. They decided to give up and returned to ask their father.

   “There is no gold in the land. We are cheated.”

   “Since the land has been dup soft. Why don’t you pant some crops there?”was the reply of the father to the sons.

  Off went the sons. Soon the whole once-useless land was rich crops.

  “This if the real gold, my sons.”Said the now proud father.

香港中学历史教材《新理论中国历史·中四上》中“周代封建”提到：“在封建制度下，周天子具有‘一尊’的统治地位，诸侯必须服从天子的命令。”书中的“封建制度”在我们大陆历史教材的提法是