Read the article and select the best answer. Article: Once a small boy lived on a farm which seemed so far away from everywhere. He needed to get up before the sun rose every morning to help his father on the farm. After an hour he could take a break for a while. Then he climbed up on the walls along the side of the farm. He could see a house with gold windows. "If they could afford gold windows, then there must be other nice things inside the house." He imagined how great it would be to live there. Then he promised himself, "Some day I will go there and see this wonderful place." One morning, his father would go to the town and told him to stay at home for a rest. Knowing that this was his chance, he took a sandwich and went across the field towards the house with the gold windows. As the afternoon went on, he began to realize how wrong he was. The house was much farther than he had expected. As he went near the house, he saw no gold windows but instead a place in need of painting. A small girl very close to his age came out of the poor house and stood there. He asked her if she had seen the house with the gold windows. The girl said, "Sure, I know." and invited him to sit on the porch . As he sat there, he looked back from where he just came. There he saw the sunset turned the windows of his house to gold! Now he understood that everyone had his own house with gold windows. Question: The story tells us that people sometimes may have the thought _ . Options: A: Like father, like son B: Love me, love my dog C: Every dog has its day D: The grass is greener somewhere else
D