Read the article and select the best answer. Article: Even in early time, people could realize the important of dreams and knew that dreams gave meaning to life. Every great achievement has been the result of years of dreaming. If a person has a dream and holds fast to it, he or she will find a way to bring it into reality . Children do not have much experience or knowledge. However, they are natural dreamers. We should not laugh at them for being _ . Many great men were dreamers when they were children. One such dreamer was Thomas Edison. He used to be ostracized when he was in primary school, but his achievements were greater than everyone else's in his time. Teenagers and young people should also be encouraged to dream. The world is full of successful teenagers and young people. They dreamt big and their dreams changed their lives and even the world. Steve Jobs and Bill Gates are the good examples. They have developed technology and brought great progress to human besides making money for themselves. Older people should believe that it is never too late to dream and that human mind is never too old to make dreams turn into reality. Colonel Saunders realized his dreams at the age of 67 and set up the biggest fried chicken company (KFC) in the world. To dream is a wonderful ability which can lead to wonderful results. Olympic records were broken by players who were brave enough to dream. No one is too young or too old to dream and to make dreams come true. Question: Young people should be encouraged to dream because _ . Options: A: their dreams are natural B: they are greater than everyone else C: they have much knowledge D: their dreams might change the world
D