Old people say that childhood is the best part of life. They look back at their childhood and remember all its happy days, the jolly games, the fun they had at school, the sweets and cakes they used to eat, jokes they used to play and endless discussions they had among friends on almost every topic. Perhaps, these old folks are right. And yet they forget many things that were not so pleasant in their childhood. There is a funny story about a boy crying because he had to go back to school after the holidays, and the father scolded him and said, "Why, I only wish I could be a boy and go to school. Again." And all in a moment, the father was a little boy, and his son was a grown-up man like his father. And the father, in the shape of a little boy, had to go to school, and I can tell you he did not like it at all. A child's troubles may seem small to grown-ups, but they are very big to them.

Choose the correct option to answer each question.

Why was the little boy crying?